Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0c1731cb215249…

MALICIOUS

PDF

96.6 KB Created: 2021-09-03 04:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84c9432b31482fb4e394fba95c5fe412 SHA-1: 18b016adbe551b70d5ad9d43f08ca0c073288de4 SHA-256: be0c1731cb215249dbad85906c7505f6c9407b6bd3bc674bf09f23bf3e12d1bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://allytemp.ru/uplcv?utm_term=logical+reasoning+questions+for+cat+pdf+free+download
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/621e75793b20f3ecb82ce4cb967d4af3/62064189120.pdf
    • http://aaaexpressac.com/userfiles/file/65392525874.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d314ddaca---relituvirodi.pdf
    • http://abwnickersonplaza.com/uploads/files/sakewep.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0c0f2cd9affc0a67680a0ae53add4d95/58800426461.pdf
    • http://coytex.net//ckfinder/userfiles/files/nuwodalulobigerotuvuz.pdf
    • http://tramtronbetong.com/uploads/userfiles/file/46524714739.pdf
    • http://hochrainer-elsner.at/upload/files/39401260053.pdf
    • http://fcraregistration.com/UploadedData/file/maxurewomopas.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b11e13be62c---47493021057.pdf
    • http://tmacfashion.com/ckfinder/userfiles/files/84505832312.pdf
    • http://aktien-analyse.de/images/File/lipigopelefale.pdf
    • http://adabaskimerkezi.com/upload/file/86500859620.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160df9fd1cd2f3---21299652180.pdf
    • https://angkaganjil.com/contents//files/83560858907.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b224135c4a---suxofixugodorelup.pdf
    • https://alibabaoman.com/basefile/alibabaomancom/files/lamuxorotute.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080a04569025---vuparofumefaxonetoris.pdf
    • http://zatoodesign.com/userfiles/files/jakapitukisaro.pdf
    • https://barcelonamedicalcenter.com/files/galeria/files/25643299163.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/gamuwowerotuputipomavega.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/m02pb5ja2v5tni4rm3hgike2n0/zafuxobito.pdf
    • http://kulturazebrak.cz/userfiles/xegozewisesebusi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011338.bin
e147b6945849fbfc970ec1a0e7ee2e1ec4aa86b8455ade6dfacdf3785d56d7f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 18444 bytes
font_01_sfnt_off0001434d.bin
8cc33bd9a4c14f4274afc4aadd238971e8ce57a7513d4ea635a59d490f887570
pdf-font-stream PDF embedded font (sfnt) at offset 0x1434D 11084 bytes
font_02_sfnt_off00015cd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD0 16792 bytes