Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed829a3a03abae16…

MALICIOUS

PDF

65.0 KB Created: 2020-11-18 21:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 455159dedc03e69ed6dc0b38666013ee SHA-1: bc6d0c2bd9d099a25222f1d5c2b3a949d885534d SHA-256: ed829a3a03abae162dab814037f01b059f27a8fb4727b0264ce9ce73cf5dcf24
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/strik?utm_term=backuptrans+android+line+transfer+li PDF link annotation
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/5436354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fa8595cc6711.pdfIn PDF document text
    • https://ravadekivis.weebly.com/uploads/1/3/4/5/134512786/gilidetofuril-bovupuwajapop-jagomisawetimo.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/juropuxav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5faae66241ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f98ee39ba6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f9542adaf93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f95f67b64d32.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/630bbc71-cbd0-41e9-bb25-3a7e6509be9d/92761853170.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/cen-tech_digital_multimeter_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/37662579947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316adb5e-65fd-4c26-bec3-278d80246fc4/wofitodozowud.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/minecraft_pocket_edition_apk_1.14.0.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_off0000c086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC086 5260 bytes
SHA-256: 314386a2300ad2f631b54d9a45b3e04c910c4b6a288ab91700d1c501193a52ac
font_01_sfnt_off0000d27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 10804 bytes
SHA-256: 2e0d7925947fd031f15cf499d5c52e689d486afe00e884e49967cf6624f8af19

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