Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb66f027829d2af…

MALICIOUS

PDF

77.2 KB Created: 2020-12-30 01:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 569e0cb59b444a3c2eecbb4c0cb3c286 SHA-1: b28f1ab8df1333ea05b5be7989e331b26a5f70e6 SHA-256: beb66f027829d2af55d1f8b7077ac552d0af5e654768d474f509c3c2dbcd84f1
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 'https://ggtraff.ru/123?utm_term=how+old+is+sandy+cheeks+in+the+show'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the redirector link suggest the primary goal is to lure the user to a compromised site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=how+old+is+sandy+cheeks+in+the+show In PDF document text
    • https://cdn.sqhk.co/zifakepavax/GheSHlF/93540364762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd1531485884.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/U0gie5D/sustainable_development_goals_upsc.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/D9XgfH5/26699909739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_5fb788b7456ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f875b9712d59.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/ihQFwid/nopebafuzuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fe8edab94f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fd6561bbbc44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/davawina/47183376673.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/lugamipunubasewunes.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/bafavaji.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/64683262132.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/negative_exponents_examples_and_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 4936 bytes
SHA-256: c7ecc6fcd96fa35b60b18ecd4e4814e457f60319e4615521b79d27d4a973859f
font_01_sfnt_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 11076 bytes
SHA-256: 750f5561cf0515563f038e27e8cac85e84f33adb691d62dc66cdf47612fcc85c
font_02_sfnt_off00011961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11961 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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