Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24eef0857546153…

MALICIOUS

PDF

68.1 KB Created: 2020-12-04 15:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7c67c85e61f7307ee47bd110470da184 SHA-1: c3b7409b7b2e8abf1df2f7aef8ec306324df4caf SHA-256: e24eef0857546153407fd17d0c9968b8517caab03d55dce1a8ecaaf5f7387c73
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with the primary malicious URL being 'https://trafficel.ru/strik?utm_term=adjustable+power+supply+kit'. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=adjustable+power+supply+kit PDF link annotation
    • https://kotevopokevunab.weebly.com/uploads/1/3/4/5/134590751/7ffe9.pdfIn PDF document text
    • https://zozidilaxi.weebly.com/uploads/1/3/4/4/134491322/df6ccbf.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/nasebid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fb41e4321139.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/b65f9185.pdfIn PDF document text
    • https://lebotuzipum.weebly.com/uploads/1/3/4/5/134519329/tasuk-pofagudopi.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/5fc5066e104edf1d779b9afc/t/5fc8e54712b56f2ae7cd99bf/1607001416436/real_subscribers_and_views_for_youtube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f978f9866f3fd2e1c9ef/t/5fc51f823c6ccf69f302773c/1606754179547/rational_roots_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61548c7-78e2-47b4-b211-77134ff81f74/vimaporakuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c42f97-428a-4868-a469-fa2068da51d2/minecraft_new_version_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc1e7d6cb3e0f577194d7b4/1606543319343/23470027595.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67d39ee0f32b874bff0f/1606379475801/20878593631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73da21a9-adae-46ee-a08c-a5e2627a0ecc/83162126479.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc365ff104edf1d7790e6f0/t/5fc5f7f5f3de5e49b532e6fa/1606809590980/zemis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90522eb-f94a-4960-acc1-2fd9df98407c/lolazumutusedazuluwemukid.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB191 5416 bytes
SHA-256: 141c2ebe79a7b18840690a9b06f21f571274e7fc99123ae5c48f2f59b1a01ce3
font_01_sfnt_off0000c41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41E 12352 bytes
SHA-256: 102425a58b93315399418890c86ae3ccc2661f1e1af002e14db200e6103f8112
font_02_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 16348 bytes
SHA-256: e152b40e7385b7b85be2955dab5b080be90e622c8fb4f09986b9158285503f33

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