Malicious PDF — malware analysis report

Static analysis result for SHA-256 379f96eb40a99061…

MALICIOUS

PDF

85.8 KB Created: 2021-09-08 06:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1acb872576fb8120937a0fd9b7c789c0 SHA-1: 3fc66d3c27f7347299ca6a4d750387112015b6c9 SHA-256: 379f96eb40a990612a1b1a2a9170b9bf6d7c316065d486d3234687fe7b0118ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://daleel.global/wp-content/plugins/super-forms/uploads/php/files/drqp41ggp0c76cf82jk8us87co/dumuxibelamaje.pdf In PDF document text
    • http://adria-ex.com/images/blog//file/tuxelufolixalabufuvir.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106051815292175.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/5323fbad281111bb5cf1cb000c41b8e6/fufosow.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/49979529293.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090afb2a00ef---40553589014.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/xabisagotegud.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/jutozizutozuvube.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/telilix.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/zivazuzijafobinalo.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/87973a940e12d8fdfe7ff5155695ddda/68351877618.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210829_188235B381AD6D4C.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e70a31193---movukosufamisixo.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/69882486047.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/71230959495.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8e555dd0f67d963d8ee3ef907aed3c0c/65171827521.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e16b3b36ab---74936897160.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/73244270568.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab150571069---desuwubikuteluru.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/solanefuzosafigon.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/padumopamewatosafinoni.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9a8b694cedafa2bd4d943944d4417446/zesupasigedapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=a440f+transmission+repair+manualPDF 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_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 17652 bytes
SHA-256: 77078826d36d3a0deb0b2bec438d4d48baf62026b1e0c0d652b5b7f69b65d501
font_01_sfnt_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 10800 bytes
SHA-256: 95bd7cb7da6b33d8b6704abb151b30d4d473c5ce9da4635124436b60d8b1859b
font_02_sfnt_off00013180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13180 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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