Malicious PDF — malware analysis report

Static analysis result for SHA-256 695d5ed4b2a6c52c…

MALICIOUS

PDF

66.1 KB Created: 2020-12-16 10:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cb2f6d62eab114828478631aa3fe8dbc SHA-1: 0248bdf78bedc9a8bc44827466c50fc61b35f226 SHA-256: 695d5ed4b2a6c52c700f7dd1da9b5c7ac7a250d21f6df8a66a75e64bd2191cdc
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, with one prominent link pointing to 'traffine.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=sort+pivot+table+by+month PDF link annotation
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/zolufitawajurow_diwepiboj_vijipu_falafi.pdfIn PDF document text
    • https://fuxomuvepanagal.weebly.com/uploads/1/3/4/6/134611725/786bb23fd2d39.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/jegikaz.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/lexipili-vofufenumupemul.pdfIn PDF document text
    • https://dironirodog.weebly.com/uploads/1/3/4/7/134760169/fuxesosafopekodu.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/xegimefelupeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc54804c89e1c4b8fdb8c21/t/5fce5dc5d336b863f0f49d78/1607359942892/2019_pocket_guide_for_coding_professionals.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4690fe10e847afbf9445/1606239888746/60433478788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e392752a-7dcd-4f3c-b919-8b61f1653f3e/blancnoir_on_chaturbate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02971e21-ac50-47ec-af4e-0007ffa02785/difference_between_atoms_and_molecules_in_tabular_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092643f8-fc5d-4072-a459-7569a2ea5541/52592426142.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b878abffab30daa7198b/t/5fcd46a43ff1011540ff4995/1607288484937/7825752829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91abc3fe-14a8-4d49-b155-155706cf1a90/lancha_precio_chile.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce25b7705f6b5d2cc48ac0/t/5fd609d596ed101a3e365a27/1607862741862/cub_scout_tiger_den_leader_guide.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_off0000c73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73D 5284 bytes
SHA-256: 832bb386c2e2877c7298476ab924ba6c9ec084b63f0154aeb9805f2234ad8b8a
font_01_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 10188 bytes
SHA-256: 86ca8cb2b269e77688147a2787ec7b308130be50e5f262b8fadf7fa695324141

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