Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eac7da53abd603…

MALICIOUS

PDF

61.1 KB Created: 2020-11-16 13:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 08d69bf4cbb87b1ca3e6f8c8ab67a52b SHA-1: 386d8a9e2a79abb6cd66b832e3aaa38e49e0fc50 SHA-256: 69eac7da53abd60377dfc1f1bfd6a526ba64ffa1f90acbe8bbfcdcd8ceeb414f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafficel.ru/123?utm_term=urban+fantasy+books+goodreads', is presented in a context suggesting a lure related to 'urban fantasy books goodreads'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=urban+fantasy+books+goodreads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5f957ec9cc8d3.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/186660.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/migajavapumumo.pdfIn PDF document text
    • https://fukudikewug.weebly.com/uploads/1/3/4/6/134686524/9f97cec396aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fa07dfb19002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f9a8c7bece9f.pdfIn PDF document text
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/3a04c1852.pdfIn PDF document text
    • https://suragovitig.weebly.com/uploads/1/3/4/2/134265770/1b89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8d80c66f5b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_5fa36b2a51996.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/popagexexoza/bisafoj.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_off0000b335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB335 5340 bytes
SHA-256: 4c03eb79f0232276b5ea13b4aaf343b027dce19f8cd0965a6d3122739f9dfaab
font_01_sfnt_off0000c57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57D 10152 bytes
SHA-256: a344d1939f8bec109dd5f3ff66e0fe323fe205284845e10d71744e65a5f74446