Malicious PDF — malware analysis report

Static analysis result for SHA-256 d320f7602219fa08…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 06:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3568b4b48214ffa55df4186f4337902b SHA-1: 52180304613839de1e4f191fd959d0472dcda4fc SHA-256: d320f7602219fa08405f0492c36e0cf50c395125504dd3a1f0df766a89ff976b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=method+of+applied+mathematics+book+pdf PDF link annotation
    • http://gaveguguxa.iblogger.org/the_adventures_of_sherlock_holmes_bangla.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/9193882.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/89519415598.pdfIn PDF document text
    • https://zitavuzan.weebly.com/uploads/1/3/1/3/131379524/bokode.pdfIn PDF document text
    • http://zogiwajuvuda.22web.org/pefiduselakatibaxo.pdfIn PDF document text
    • https://fisusaweku.weebly.com/uploads/1/3/1/8/131857315/2ceb7ac9fecbe41.pdfIn PDF document text
    • http://wowevopopof.22web.org/strange_days_on_planet_earth_invaders_summary.pdfIn PDF document text
    • http://niwimimotejus.iblogger.org/lipazizekojer.pdfIn PDF document text
    • http://botavubapisod.mywebcommunity.org/38541446795.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/9160539.pdfIn PDF document text
    • http://galusevatiwesol.22web.org/molaxenebazifatetajenesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_2e1e17b6100240b7bb2a4b8c130dad4d.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_3b79ed5b2434421eba566f2d54b7fb0d.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_e989908b3dab4bdfb435eccdccb389a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1e6de8-fe3e-4ec3-956a-361423169348/bawatodonizajaki.pdfIn PDF document text
    • http://zazisuj.epizy.com/zebuveramazekomidatobodox.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_050274c53abb49d49b1b87716c662717.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/671b2f48-384e-4029-b72c-16e65fbd8213/jetefurejixulemeruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfd76bd-154a-4b58-ad79-29505033dc0c/what_kind_of_poem_is_neutral_tones.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/g_shock_rangeman_gpr_b1000_strap.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/protocolo_eras_nutricion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce26ee80-1005-4b79-b92e-5036e125e4e5/jaxetujanuji.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 5508 bytes
SHA-256: f0e8ff4434aa73cf625f8b4c0b802ba6e565fe58ecadcd0adb7e8266c23d2e79
font_01_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 11840 bytes
SHA-256: 3df596b3bee3dacbf0af5821b4383607f5fbada3a31ca489fd39085fe803f080