Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f42681b285a2a5…

MALICIOUS

PDF

70.6 KB Created: 2020-11-24 22:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7f0675bc1bd840a85d55c0b2f55b8537 SHA-1: e8029e89777d219ade1b4831567e0d99258a9be9 SHA-256: 04f42681b285a2a5c230fca5d760b8a4b4354e3d86def93c25520430476e9131
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or hosting malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users.

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://trafffe.ru/strik?utm_term=calligraphy+alphabets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5faf7ea676b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_5fa76d538910c.pdfIn PDF document text
    • https://wanezetisozol.weebly.com/uploads/1/3/4/4/134468493/nikojetikuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8cf3b39108a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fa0f474628f9.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zujuko_davupab_fixadolotuzeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5faf3851cfc4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab2fd63-2bb1-43e9-b6a2-3e2c32d70489/62537430351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c038fb2-5aa2-4512-a5cf-8afec1d3fa5b/fubexedewuwosinunoku.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/ribabelaxefunejimetumegex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00b5311-38b4-452e-83fd-8ec303bac4e6/fegabumujadogod.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/dojagawuzamuzik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d1b55f-4119-4fb2-b539-fd0e47735903/tadujiwojaxulo.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_off0000d55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55F 5452 bytes
SHA-256: 13fa2a981e6ffe181c0bdf770de851536507605ab120735a984912f703219bb2
font_01_sfnt_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 11192 bytes
SHA-256: a0364de8868c4362adaf995f0973cc41b32165545cdd8f74204a7f337a2cbed1

Open this report in the interactive analyzer, or submit your own file for analysis.