Malicious PDF — malware analysis report

Static analysis result for SHA-256 853e5674573899ce…

MALICIOUS

PDF

86.8 KB Created: 2021-01-06 04:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ab1108bd818a24193f481f704d2d6877 SHA-1: 7c82f51724ea9e3f6060e8c5105f759d784015ed SHA-256: 853e5674573899ce78644b00d6237f74a4bcbaa7f907c88076384f557ee68241
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV detection further support its malicious nature. The embedded URL is likely used to lure the user to a phishing site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/123?utm_term=best+riven+na+playlist+hipster In PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fbd9aa3c7771.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/ia0JWzi/98721267454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_5fbdc810a6365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_5fd1f3a8a4ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f8fda8c3b630.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/iicihhb/rechargeable_fan_with_light.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/mupakijivuruzim/budalo.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/5042600480.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/41624538515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b76c196-7a39-4669-afde-f8475314f2a5/to_be_present_tense_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 4216 bytes
SHA-256: 8cfe9f8125744dfeb9bbeb3e6380e48eac60cba2f8395e32970d0ff3da930822
font_01_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 5120 bytes
SHA-256: f6c5480793728d2e848f544f76f5642f8dff268402c67fbad43bc9bf7e011851
font_02_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 2268 bytes
SHA-256: 72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993
font_03_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 13340 bytes
SHA-256: d1612cd5abf7cdc5bcf9dbc23a633afd301e37066c4a846c165e4737b30a854a
font_04_sfnt_off00013607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13607 16228 bytes
SHA-256: e31c3deeaf0ad32e88b604c86d8a6ea5972b5764517207e9f14068b7fb8b63ff

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