Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cccb4d4034cc9b3…

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 07:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 22b561c9c7dc44581995977a9c732156 SHA-1: be01e92ca105d75ef1d0f7bd4ccfbc217cc666ed SHA-256: 9cccb4d4034cc9b39d9e6b8cf5689f96c8d83f4e24c098b894c2657dca1c1ed4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e734ad034fb73a085a922f0fff7190be/19979536062.pdf In PDF document text
    • http://ibshop.gr/uploads/_uploads/files/naragenekirolo.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/04b8611769d68e52a2074ef7b926feeb/jesujarajefofabojafuf.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/315aeeac6ab124ad255427d51fb0df2c/kozusadidetawawoboxeri.pdfIn PDF document text
    • http://poorclarescork.ie/images/xigeputobutaxevedegad.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988690517f3---gavuragotukomipegibud.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/xufugabekufive.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/57b214b6ed6413f8730dbda95f928cd2/41885519014.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc7b4b580---ranagoxexibela.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4b24fa3f---lamuxaselokimatakapupusu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607568a75aa22---begovojege.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/kewolilezubipot.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c3f9d49fe0385e8468bc4668ecef71d3/leziwo.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099703308111---seluxororireju.pdfIn PDF document text
    • http://goref.ru/files/file/36391674457.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nmin82cq2nhq0e7mlguvnst50m/sopifavubenusam.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/wefibipesalowuf.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876921c9ec3---66659899481.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/993fb56b702c03466de63c5aa502a4eb/58445344826.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/rijovupoxave.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/peomgs7lukmj165b8inl8qdonn/rigodakugalijedawuva.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/sawosi.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///dijuzulosagewomalow.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/16189054536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=periodic+table+quiz+answer+keyPDF 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_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 17252 bytes
SHA-256: 4bd24c88c485f10200c32fda297250b89132ec54871f49a9c8be4962452a33f0
font_01_sfnt_off00012190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12190 11100 bytes
SHA-256: 6681f3fcc951e13f29bbea8ce460cd84d7b4147a9950019138a32f50419ecf4e
font_02_sfnt_off00013b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1