Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd01894392e8f228…

MALICIOUS

PDF

79.7 KB Created: 2021-09-04 00:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 283b3042096d28634992010e30ec4915 SHA-1: 84791e4f305fd575323b6f388628b10a9a254ec9 SHA-256: fd01894392e8f228b35d8def421103facd1cd7230b41f1ed13a5c7cfec477938
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to compromised or disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and content suggest it is designed to lure users into clicking links that lead to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=different+methods+of+separation+of+mixtures+pdf PDF link annotation
    • http://szsahsh.com/uploads/files/5876579020.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160702317f3dc4---88371951126.pdfIn PDF document text
    • http://coffee33.ru/archive/file/67876851091.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/zexemedoli.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/kenenubirirovimego.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/48955838378.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/pj8gsjgn7de6hahi2k32tjj190/pevip.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/j7ieu5kofj40uuphrm8rd02l46/lupajoxozu.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/89707152258.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/kizadataguwuratutakon.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7af041cbfe---9961426881.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/67863225516.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/ninifuxegadezanevuzasix.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/jesixuxisigo.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/57380697956.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610006e48714c---1664538663.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/xaxelunaj.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/xefalin.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a4be5eff38065fb7379740fcc38be93b/voguzowavozuri.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/cbf5573cd4b03f059a86c2b66cf7263f/watuzowodopurulusaloneko.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/19/file/gobagogu.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/4e0a4428cfde7dba8af2f5630e5e57c3/jevinovivibutozokinu.pdfIn PDF document text
    • 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_off0000d440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD440 10920 bytes
SHA-256: 95a8f0037e4e748f6ccea568248fd73a2c4d8e100cda44f888a7e8058911c1ae
font_01_sfnt_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 17344 bytes
SHA-256: 0269ea26b5f802304906e92f101c76842497fd0f7d0e7812cbaf82b5a3874612
font_02_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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