Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a91a6eca008788…

MALICIOUS

PDF

205.0 KB Created: 2020-12-03 16:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 92650bf6f0f36d027432225d1547f740 SHA-1: b87da82bef1ad95309d00ab149cf40f1bf8ff1bf SHA-256: 42a91a6eca008788e1db638618669a17c04d656830f9f9f23d9c616dff00feb4
162 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://traffmen.ru/aws?utm_term=gridview+smooth+scrolling+android'. The document body, though heavily obfuscated, contains text suggesting an urgency lure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent. No scripts were extracted, but the presence of a malicious URL is sufficient to classify this as a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=gridview+smooth+scrolling+android In PDF document text
    • https://vosuliliwux.weebly.com/uploads/1/3/4/7/134713435/6a8a24.pdfIn PDF document text
    • https://vigejudekoseja.weebly.com/uploads/1/3/4/5/134518300/1c034e5.pdfIn PDF document text
    • https://refapolujagosax.weebly.com/uploads/1/3/4/8/134896756/winusul-lewitazof.pdfIn PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/3fb3487.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/5fbce344be7cfc36344e8aaf/t/5fbe0434bc819f1cf49f46c9/1606288437627/la_ciudad_del_olvido_buenos_dias.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c1ca2bbd74065805c248/t/5fc0e53fe18c5c478e1ccdec/1606477120267/the_ethical_life_shafer_landau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df25c57e-9488-493c-a276-8d4f36a8bbb1/wiwodulewotujoxetobevir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf699c1972c46e3c9721e7/1606379933503/sad_love_story_movies_on_netflix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd086945ca4f790267adbd/1606223977613/pogo_big_city_adventure_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b82e11f6a419848b6c75/t/5fc2e0a518e72e5fdb374209/1606607014669/paula_deen_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8765a71d-5f16-49cc-8ab8-7fc174382670/study_guide_for_bradburys_a_sound_o.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f4e3485235c86bdf3d3/1606377297197/valumomubu.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_off0002ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0B 5536 bytes
SHA-256: e2a3af37674a25eacaef6bc11e0bd1ce0261cc4116370353d9692628ada0401f
font_01_sfnt_off0002ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFCD 11664 bytes
SHA-256: 7bd20ce480299ead36acae5bcaf68d65256fe40cc361edb3335de0c02af768f1

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