Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0d677d0e43500a…

MALICIOUS

PDF

70.4 KB Created: 2021-01-11 17:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8a4498840fb593c21e4c52f2e870a549 SHA-1: 7530edee474d3c7f6650b916da6db9b7db1aa092 SHA-256: ef0d677d0e43500aba623dd99ebd12a15ee551ca5f4ac971436d085517164687
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, many hosted on CDNs and Weebly, suggesting a link farm or redirection strategy. One URL, 'https://trafftec.ru/123?utm_term=black+seraph+pathfinder', appears to be a primary destination or tracking URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=black+seraph+pathfinder PDF link annotation
    • https://cdn.sqhk.co/narobalof/giggjIK/pirarunizuxogegavifuj.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/ZgjhdJ5/10684344548.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/3892042.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/zIhjgdp/telegram_x_windows_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/hm9ijjd/sobewudonodozodew.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/jbhdhgQ/48744239296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5fdd083ff35b5.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/7daFhax/pay_my_entergy_bill_online_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/LDXCjjh/teppanyaki_grill_for_home_kitchen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f9d779da084a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_5fb9723eb61ca.pdfIn PDF document text
    • https://wimopoxidiki.weebly.com/uploads/1/3/5/3/135313965/b7bb93.pdfIn PDF document text
    • https://vawilateg.weebly.com/uploads/1/3/4/6/134697686/raxowenumuju-ripekuzibi-kadufi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suximawo/logical_fallacies_quiz_with_answers.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_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 5356 bytes
SHA-256: e3bc5037c481c8f92d86d431c73d2d192d1e91a0932f927da781e348f48050f4
font_01_sfnt_off0000e865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 10628 bytes
SHA-256: 61f97f127432f72e5ee6b06fb9034fd9b6d8957cbc44d3a1080e89f04045c300

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