Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f9d4e89d216c82…

MALICIOUS

PDF

84.5 KB Created: 2021-07-01 11:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1124b77e05fb47e6b79a4648a3e3c418 SHA-1: de1d32f1048d9282d80b62abf673bce8be8c8036 SHA-256: a0f9d4e89d216c82597b277a9f2d47a7e90d2666bbc31a60c0f230050f49bf4c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/05f0876560d08508e941eaac7174b5a6/49348748803.pdf In PDF document text
    • http://sugarfree-gelato.com/upload/file/mitikosevajajuvovofa.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8db1f03dceabaaacf7248980ac227ff8/vutokixaxepovev.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/bugakifubabexomodo.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/noxajazuwevi.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5bd0a1a7520c58da73905c47c985589d/debitivoriremoj.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf61e408b---47870619496.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/vumasuxuwevirasokagese.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/xidamadatezejakowuz.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/tqij1524nmj4tsqfq9boukgkdl/87940533586.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ad024701---64104766557.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3ef6ca8cfd96620e4ea6d4e84f83ab01/87849373786.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d0ce5bbd6ec8bcd0dd179c74bc275503/25292987570.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/91632525199.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/vras17o9qvfgd1m82ff07paoi3/fadegifabosutomazun.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/bilumolewifatojipukibaxax.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/db149ede987a35e27b2876ee32189ecc/19371569639.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/85155230800.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/94400916539.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/jinew.pdfIn PDF document text
    • http://waterreducer.cn/d/files/bufisadofiteromepawo.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/324d0e6f0ab5fef7e074e60f251b9a44/72891525957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sims+3+tablet+free+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 16972 bytes
SHA-256: 8184ced14e6f20dad4f07d4e76ff981c95cdfceb386ff249d01f4ba7408c7eef
font_01_sfnt_off00011380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11380 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B97 10988 bytes
SHA-256: e5927b6e69085af0565a7bf595673ed51b42ac2f316db4d53466a232f71b8ad4

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