Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7378097a3cbb914…

MALICIOUS

PDF

73.3 KB Created: 2021-01-14 11:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7def9a5e8b0cd2edbcc61f8fa2f20135 SHA-1: 93613f23d406f8d30a71bb69815254660f893c83 SHA-256: c7378097a3cbb914d6e371bd690c8738c9533c2af8dec9799cc25a73667f18af
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 indicating a malicious redirector link to 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=inversor+allen+bradley+powerflex+4+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5feb99f05f556.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/jbiejb4/77026094907.pdfIn PDF document text
    • https://site-1177743.mozfiles.com/files/1177743/john_mulaney_okay_okay_gif.pdfIn PDF document text
    • https://site-1168260.mozfiles.com/files/1168260/labirinto_hand-_knotted_wool_rug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5fe02ef5d2d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f9ee5ab2dedf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5febb47d548a4.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/fasanag/nafimi.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/15254076906.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/bmtc_bus_pass_application_form_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/coloring_leaves_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/pokemon_battle_revolution_romsmania.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/copper_sheet_metal_scrap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 5676 bytes
SHA-256: 5818b8f4ace2420f72e661d2fd4dff9eb4597b41df8ca4d5843f38c4d70769c8
font_01_sfnt_off0000d72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72E 12380 bytes
SHA-256: 14c4edc30621bcbcc3e9d46fcc37eac026b49b5f459892a9c368474897a91e9f
font_02_sfnt_off0000fed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 16712 bytes
SHA-256: 5fe40dc6dbb9e95a125a1256edb50e92e9e967a34b28cf6b2685e48fb2b7ff9a

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