Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e09fc379ccdfc6…

MALICIOUS

PDF

84.0 KB Created: 2020-11-14 10:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f29a9c8d76fed334a36111c1a11f8904 SHA-1: 9519d8982d03c1c06ddf1e99451e4caa15059b96 SHA-256: c7e09fc379ccdfc6db7f3200336cd6ab64f52621b02076a320a9d0398fc4a6f0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'traffine.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Bth ms_rfcomm driver'. Additionally, the PDF is flagged as a link farm containing numerous external PDF links, one of which points to a potentially malicious URL on s3.amazonaws.com. The ML classifier and ClamAV detection further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/aws?utm_term=bth+ms_rfcomm+driver In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5f9c3971ee7a7.pdfIn PDF document text
    • https://xawuvokepixa.weebly.com/uploads/1/3/4/6/134617960/c49cb4f96cc029c.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/d3110f72cf179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f94b35c0cc8a.pdfIn PDF document text
    • https://bodonejuw.weebly.com/uploads/1/3/4/6/134686214/6105079.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/najubu/vafinoperufedimimipiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e17417-34ce-491c-b718-df0bd9b5b22b/7530543214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d93f46-b4e8-443a-99ab-ef05472f77b2/sudinitudaxavevanezojojo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/a_wrinkle_in_time_books.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/apwh_period_5_key_concepts.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/26899042726.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/2001_mercury_8hp_2_stroke_outboard_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/marriage_certificate_format_haryana.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/gate_agricultural_engineering_study_material.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_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 5156 bytes
SHA-256: 76f86b3e0c1b48986ec3d083a066c4d267c938b93dd4cef529ff60550ae2da76
font_01_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 12300 bytes
SHA-256: a02a2e33f509a96eb8ec1d5fafcbc3c107ac8a2ed81f9cca418c38c8d9df30a3

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