Malicious PDF — malware analysis report

Static analysis result for SHA-256 f949e8cf83d735b0…

MALICIOUS

PDF

78.9 KB Created: 2020-12-26 09:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cb2cda8031f539bd370eba1045d922e1 SHA-1: 7a952522f7cc7ba353ac5f3456e7a5a58e3fbdca SHA-256: f949e8cf83d735b01b02712e2b196f0ca84dcc34f670fea74eee7946fc6341bf
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=pixel+blade+m+season+5'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a potentially harmful site, consistent with phishing or malware delivery.

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=pixel+blade+m+season+5 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4455390/normal_5fe332b46108f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5fe18232274fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5fcd641daec87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5fc6f3bfb1cd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5fc6a73ee9ffd.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/tosego/majilitutumoxogap.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/lofotonitagegefi.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/75108105436.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/dekenovapigemafanoxufidex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e38f2d9-4d03-444b-b011-f401a3bcf55b/atonement_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/worez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f161ca97-4e23-4e1f-a97b-f11bd8348fd8/king_lear_questions_leaving_cert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44a27c5-81a1-4ce8-b485-c48042fa8086/mubixawarofalokovirunis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a983a6a-a2e2-43d0-af4b-e6fdfa85f96f/roxonikilezanedebokomoku.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00D 4120 bytes
SHA-256: e0f82f6a746d860eb98ef82ce80ff3a632cb2a3808f94ac842e052cc90336f3e
font_01_sfnt_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 5208 bytes
SHA-256: 47e160da09e21bd6246672bc26c66890366968a4cfd4fb266ec2acccf1fd8a53
font_02_sfnt_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 12756 bytes
SHA-256: 9e0e380c004ff57820f5f3a1758d428762bd7a88cce129d9c59b503aff8f6a57
font_03_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 16116 bytes
SHA-256: 71b2491630faf6f8a9e3c3f2a8297076d6941240cc6dc07f338f439fc66915bd

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