Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fabfd32cb0cbe1…

MALICIOUS

PDF

62.3 KB Created: 2020-12-25 07:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fbd61f3b917d19f8f8fb14654d6b431a SHA-1: 96f2733509dc843864ad43316746d3055e9a0ac3 SHA-256: f1fabfd32cb0cbe18dec65a3a9d457c53125e7f6b42f59d528c1c6b0179e4224
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://gettraff.ru/strik?utm_term=words+with+b+r+i+d+l+e'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=words+with+b+r+i+d+l+e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5f9d3f09a5039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fc34a6b07fd3.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/13fPZgf/wufagiwatajomogi.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/a05aaee0-3abf-41f2-a5a8-b3fdc1a0742d/korolesiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/35595141342.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/latest_afrikaans_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/dell_poweredge_r710_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd32cd49-6e1a-4c94-bf2e-8471ba611075/8499313037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e859966-c4a2-47af-8c29-e872d38c3e8b/30474765568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93f5a47-5447-4180-875d-80bbf3812969/43461349408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775ed755-1b91-4f7d-88ed-917d67caaa55/human_braiding_hair_blonde.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/lego_spiderman_games_unblocked.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_off0000b916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB916 4948 bytes
SHA-256: e411ddb240b50b2b9d47c23352e44f375a68edff3b360d8191f84fbce1d611cf
font_01_sfnt_off0000c9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FB 10268 bytes
SHA-256: 28b70fe67447c286de1ad957cdc36490a572c43f4294af3584ba0e2bc8ae5756

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