Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4a1cf413f129c2…

MALICIOUS

PDF

91.9 KB Created: 2022-05-29 10:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 281eb90601b371c9492488c61f1174a0 SHA-1: 380f0c918088ed5fe4980becb148fb137f937221 SHA-256: dc4a1cf413f129c2d8f912bd1e6d0a567190fa5ec8f6e6cc335a9097975cdb79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to various PDF download sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs indicate a deliberate attempt to obscure the true malicious intent. The ML classifier and ClamAV detection strongly suggest malicious content, likely involving the download and execution of further payloads via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lovig.co.za/YmrXLWy8?keyword=the%20penelopiad%20play%20pdf%20download%20torrent%20free%20full PDF link annotation
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/gojulawefiromejefezadeb.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/zozuxasexuriwefagi.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/basiwusekisebog.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/zotenowem.pdfIn PDF document text
    • https://betijefozivur.weebly.com/uploads/1/3/0/7/130776077/buvizimozuba-risibo-kazusudukox-dizutaxajer.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/68028982805.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/56247437350.pdfIn PDF document text
    • https://xomiwisaxi.weebly.com/uploads/1/3/3/9/133999446/eab59d.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/zibiguripibixovet.pdfIn PDF document text
    • https://www.irisgroupbd.com/templateEditor/kcfinder/upload/files/denepax.pdfIn PDF document text
    • https://tahi.hu/ckfinder/userfiles/files/20737235165.pdfIn PDF document text
    • https://jjpremiers.com/files/luxokavapexugiwubezujika.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/52355941246.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/40494420856.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/76099401240.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/nomikitutorawudufufobid.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/lezilopukopalokole.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/vemukivilejemalal.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 17924 bytes
SHA-256: 21b53cb7ca4da3d50d295366a063afb658deb0d6c5deecb25c585c313bb64193
font_01_sfnt_off000132b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B0 10692 bytes
SHA-256: da2be89f30970f7d47955288ad2070c11c46579bf603674758d0a001b38a4234
font_02_sfnt_off00014b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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