Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff32b7bf563d6ff…

MALICIOUS

PDF

74.3 KB Created: 2021-09-22 12:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6ab32d1cb81318acc17805223c703ac SHA-1: 5cbb952bfdd92956c394d217c8bbc0873afd6c7f SHA-256: 3ff32b7bf563d6ffb076944ba2895ac2de600a00137b3c84d13d4a98edc4c967
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bodymart.in/ckfinder/userfiles/files/fugenuluzazikevepik.pdf In PDF document text
    • http://okvin.org/userfiles/file/zitetadimogebuzanabuni.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/ragirenenukuzulovufar.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/rogipuxakamilosekosetik.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/nasuzemeletifodubegega.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/57769022439.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/13310321143.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/muredurajovubixoxax.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/1235404031.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/89176249802.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/rijetigamovativegosutef.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/59242582987.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c1fc48234561adb0f874b66485a06f7d/12187239915.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/dazafupexidogu.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/soxasuvadebitapapu.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/48752544552.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/ginoxisofu.pdfIn PDF document text
    • https://computerzone.pk/file/40298208016.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/nowagol.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/fujuxu.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210902_F0491AA3C0C96505.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161444053b4914---39385753266.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/2947161956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=greek+and+latin+words+in+englishPDF 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_off0000bfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC9 16828 bytes
SHA-256: b1145d9df96a3489150f7592997c1071fd2a46ed523b95003277d86b85b4f310
font_01_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 10744 bytes
SHA-256: 8238a760c013ad9bfda571d76adf959d6ee3da65936e9a395bf9160a7888fa8b
font_02_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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