Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d1ef664c032241…

MALICIOUS

PDF

66.6 KB Created: 2020-12-20 07:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cdca5877bf61d487c0f82df6c436ac4d SHA-1: 7479c0fd3bdd4793d8a0229c54ac0a0951d64c82 SHA-256: 35d1ef664c032241750d6d447229229ae64ddda26f6d76b38ef9da9e13f442b7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to software downloads, suggesting a phishing lure. The presence of multiple external links, including a link farm, indicates an attempt to drive traffic to potentially malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=vmware+player+32+bit+windows+xp In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5fcc2b033593c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5fa3d71a8e8f6.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.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/5fdd46f08715ea0dc9cdbd2a/t/5fdd8d166a6ad7222f040020/1608355094944/dofezewilijubewujomuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/casio_scientific_calculator_fx_991ms_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf513b145a8629dca7a541/1606373692872/ordeal_by_cheque_timeline.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/rijuj.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/guxegibej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe29bb08845d0924540fd1/1606298044318/free_steam_gift_card_generator_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/avg_activation_code_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eafdf7b-f2b0-478d-aba4-f9c10514818d/xopefowoxojeze.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/dijeraxubi.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_off0000c6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D7 5768 bytes
SHA-256: 86f1e95fa3f38de53a58f0c6ebfb87b2a00f1c3f18074ecfc08a1fc24bd4fecc
font_01_sfnt_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 10332 bytes
SHA-256: f0510630f2c23dd27936f02e19d72cf0aeeb62e23bb89821dac46458b6f15bf9

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