Malicious PDF — malware analysis report

Static analysis result for SHA-256 564288bc843463ed…

MALICIOUS

PDF

76.8 KB Created: 2021-01-23 06:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8280bdc002867d62fd64d9ca40c4bb96 SHA-1: 06798c244cef59db84ff95dadc37e1c29946ad9e SHA-256: 564288bc843463ed38aa58a2c7653c7bd924fe23e0d78e284efee7dc767825d5
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 0.9998

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://baarspo.ru/aws?utm_term=jurassic+world+hacked+version PDF link annotation
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/e351f1813692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470209/normal_5feb605db02e5.pdfIn PDF document text
    • https://cdn.sqhk.co/neguvobipa/Ng0hahd/37435132583.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/4c6325f00.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/1ig5jib/torojos.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/iihhAje/office_lover_game_story.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/3d9a3d557f4369.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/UL6mOBN/zuzisisegopixivixexole.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/fDghjhk/birthday_cake_celebration_images_download.pdfIn PDF document text
    • https://reponobokuwe.weebly.com/uploads/1/3/5/4/135401207/safopovosegu.pdfIn PDF document text
    • https://botironolimuvot.weebly.com/uploads/1/3/1/3/131380397/9225637.pdfIn PDF document text
    • https://fawofasoz.weebly.com/uploads/1/3/1/4/131454040/rasud.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/tamobalasu/twitter_video_apk_pure.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/school_days_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/vujijirijovagagofiros.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/73943528059.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_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 5232 bytes
SHA-256: 30a61f857588710a90b3de5a12ca05c5fd8ff96b82f9ee998efadccf0b3d98f5
font_01_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 11188 bytes
SHA-256: d4b91886a2ff65c249f1da796866fe856d16699f2d512a7dec48cb81bea16b52