Malicious PDF — malware analysis report

Static analysis result for SHA-256 f378e4961151a355…

MALICIOUS

PDF

67.5 KB Created: 2020-11-24 06:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dfdbc974b6d269fb08c5c52132498022 SHA-1: 13c8da2a08db8d71dd70cdc21359c0b250541b7c SHA-256: f378e4961151a355170feb9919a529689f8fbc1b7594bc3d3758418861bdf8c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffine.ru/aws?utm_term=parliamentary+system+of+uk+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f89756cac30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f8b216d14ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8c1c011902e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5f98c9d97ca82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fa19bd00cf0e.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/wakateb_rowotun_ruxabam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_5fabc7932d97e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_5fb7a008e9585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_5f9816a168976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f8bdbee5ab69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5fb4e353bffc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5f9868a12320c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5fa25aeda0c13.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/89312e79-b593-4ff6-b6cd-519ee85824dd/29022610224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2525e0dd-9de2-4fce-89dd-e8dea5c30ba3/nuxaxejobo.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD3 5356 bytes
SHA-256: 79e663c92383ae2c0c079121f565c257288258d5abfa16205507204047cb971e
font_01_sfnt_off0000defe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFE 10188 bytes
SHA-256: 0e5e65e93512abd211aac57058b22a47f12d9bb50548c566530b9053a1888f58

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