Malicious PDF — malware analysis report

Static analysis result for SHA-256 162512f2c2b3af0e…

MALICIOUS

PDF

72.9 KB Created: 2020-11-09 17:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 416854e978641b8eb17e02ebf4ad1b64 SHA-1: b62265fb0c89bd67682ced2caa7072b6cbb2934b SHA-256: 162512f2c2b3af0e5b07fb210c3170f5280471ff26b5854ce6946172087f37da
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, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. One of the primary URLs, 'https://traffnew.ru/aws?keyword=artemis+physical+appearance+and+symbols', is flagged as unknown reputation, while another linked PDF is confirmed benign. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

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://traffnew.ru/aws?keyword=artemis+physical+appearance+and+symbols PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5f97117791684.pdfIn PDF document text
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/punejin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_5f974ebee62ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5f8ded9a39bb9.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/5275350.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/9f282717-11f4-48f9-9170-55d46d4225e0/wopiwemasegigopez.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/vuluv.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/2.2.5.5_packet_tracer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/organizational_change_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f795ef99-a66f-45c2-914e-429bfd0c49ec/rockman_exe_operate_shooting_star.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/black_asta_50.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/91549878200.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/vamelixotuf.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 5544 bytes
SHA-256: 47a3622723a6f7453454296f9c3bb198344d9d4051f747bd09619cab9257fb39
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 11260 bytes
SHA-256: fdb2995420c8bd072c0abc8734c4cb817bcc2017b5d282b717394d83490758ff

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