Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4bb01829b0a032…

MALICIOUS

PDF

90.2 KB Created: 2021-08-03 19:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b16d3ee603dedd4efedf3b3832d8addf SHA-1: a939f08f1c7261c6362979a5f5c2b9d77563136e SHA-256: 1e4bb01829b0a0326f021fc8256ada8ac988d00074d0322254ba53780f4d6dac
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document contains numerous links to potentially compromised WordPress sites and disposable hosting, suggesting a link farm designed to host or redirect to malicious content. The presence of instructions to disable security software and a password for an archive indicates a clear intent to bypass defenses and deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://alkalacarservice.com/public_html/userfiles/file/60339571844.pdf In PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe1c9d718e---69241637364.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4f055c86d---lozetedixinuwixalazok.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c11d2e2ca---popepeferu.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/baxawavujuzemezozokituw.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/lotuniv.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/76961362594.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c112fd2fee2---potalekekodawelixikelebe.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0vapffe5opgkf288r53gakka3u/71958746776.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/53681232547.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/32bcf608a9537b6bf0d90540a3cb7267/45700563787.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160be97afcbdf4---87510849174.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bc7158eed---53536181833.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/74525333648.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e765658bd194df8fd16c42ac511ee531/fawejejikodonifabifodaba.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/727b33561b474c703939faa205755a3d/poxixaxuw.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/45422998791.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/uun14lsth0l9e7rjns2h6k7bg7/gawudiburuzi.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610449af39df3---87122506948.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/jopesafuwe.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f3c063b06f5---68532055047.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a10fbd5413b17be774e29ae71776df82/noromexukutatanefawaka.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/61611042701.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210609021401.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/xanitasurita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=cain+and+abel+for+windows+10PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 10680 bytes
SHA-256: a8edd6a8e86b30b1109cf7dbd7075206d6c847010931c0e74432b01bb9d50176
font_01_sfnt_off000113f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F3 17460 bytes
SHA-256: 3eaafc7ce364b04ed80ddfe892136a5e2163f25f3d537efd3e6d4c72743f2d36
font_02_sfnt_off000141ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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