Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ab2c1429cadee1…

MALICIOUS

PDF

87.5 KB Created: 2021-08-13 09:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 61272e23d4bc7cee4d5bfceed4967770 SHA-1: 11917f052cf8d58dc2f16256f4052a763881a5ec SHA-256: 29ab2c1429cadee162e4826fa64e8a7516d97537bed6efe3db0aecc6f399edb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/hho9cnn5pr3bok7oedtvmam5ni/ketegozebinewijajugoxowoj.pdf In PDF document text
    • http://cuatro-pr.org/sites/default/files/file/julifimide.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/8f57454d2fa378ac7faf9856c101e158/fekeve.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e0eb51f66dfb074ef5fb11c62d499ed3/zexelogumefokuvatovifidaw.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/pidilodotole.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8d831c63---64093331337.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082eeb638fae---2931647852.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/12348778a902a89600270f239fe09b80/kemalejogatekedavorekato.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/nekexozedasudepot.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0df50b96a---28926135569.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/12023696345.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/aaf425662ac5d9899a260d8aec625394/kugadodunemizutevepexumi.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/gfgms51kvpsk127tuhga1mis9l/pulowutigugavo.pdfIn PDF document text
    • http://funperm.ru/content/file/1694933034.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/48447613299.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608d404e1644c---35583931387.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/73008053896.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/82803422982.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bef6190968---22138758354.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610b099a03a0d---mukarusujegominojusopase.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/73186312959.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8cc509d4c460f95562fccb6dedb82d8d/wiwanawuje.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/43594569659.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab46025ef---15906640006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=championship+manager+4+patch+italianoPDF 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_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 10932 bytes
SHA-256: c81497dd3193072e3ddb7d5f38df11dd2a1a94b7ce6fca1b002b1b1e6e75865f
font_01_sfnt_off00010dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 16360 bytes
SHA-256: 35f250ab0e6ee2f3ca0cfeb7a31e617dfbc764ef44bea895d8317dd08cf7aba9
font_02_sfnt_off0001384a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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