Malicious PDF — malware analysis report

Static analysis result for SHA-256 612ba5433833da81…

MALICIOUS

PDF

65.7 KB Created: 2020-11-20 06:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b9e9a6e681a4216d03dd3a62dbed6c6b SHA-1: 1eb8802692933542b55c1bb72e3f85adeb331fba SHA-256: 612ba5433833da8168eb0ad36ef40c2fdad2fcf9a1ed01d88341161f5ade6c8b
156 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 0.9998

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 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.
  • 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://traffnew.ru/123?utm_term=spark+plug+non+fouler+for+o2+sensor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5fa71948c25cc.pdfIn PDF document text
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/0350ded95ca9.pdfIn PDF document text
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/2681154.pdfIn PDF document text
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/vudapired.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/nulemuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodepova/relimoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/11431481534.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kiss_gel_nail_polish_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/juxovosefixojojoxadada.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/jitexevesixinunosa.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/kenmore_dishwasher_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/alpine_cda_105_bluetooth_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/alldo_android_smart_watch_reviews.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_off0000c689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC689 5368 bytes
SHA-256: d1a3416dabc45ced738f43e620410d483ecb246934d5daaa15777d7d788522bc
font_01_sfnt_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 9728 bytes
SHA-256: 30a6bde57da2df9ef4fc59d9907800d249918f22f14f6cd69105ebd378d696aa