Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bfbcd7e1c6f968…

MALICIOUS

PDF

71.6 KB Created: 2021-01-06 21:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f9b7bc8b828c57d3b51869b8b3de0bf1 SHA-1: ee68488fb9e42e8fb5d5b9a6cc97461e1f63b14a SHA-256: 14bfbcd7e1c6f968b716a5549367a4a5cc83754acaad2a7f00fdc5003a2c6bd2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, including one pointing to a known malicious redirector at 'https://gettraff.ru/123?utm_term=cargo+bridge+level+16'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://gettraff.ru/123?utm_term=cargo+bridge+level+16 In PDF document text
    • https://cdn.sqhk.co/dakagugi/fjc1eA1/75793511667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_5faa3f0b3110c.pdfIn PDF document text
    • https://vitudanowule.weebly.com/uploads/1/3/5/3/135341415/rudamisuvojidiz.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/zitera.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/0e0097bf-f9b1-4ae0-8153-0c7c270b104c/sejujumugawowujele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51911524-db6c-47ac-972a-6a11825263c1/kinetic_friction_equation_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8006c228-a3ba-402e-a254-2c2c48d7a0db/thermoil_battery_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b498c97e-c7f8-41dd-9863-cbaa1d3f0f32/3766428464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb8a5e0-cc5a-4563-aa36-dfe7bd7a3338/dupotiluweraku.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/soft_launch_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850f9548-a5a5-4fdf-a251-a52916caca54/zimajabevopazobekew.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_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 5128 bytes
SHA-256: a1f2128be1fdec8316d5cfa62df65c08f529bc2b3177c58a19ae06bc61557c78
font_01_sfnt_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 11624 bytes
SHA-256: 53c2c639743f3ba8ba70c1a5ed9f64df92282fdfeae8394f5ca7ab4f60aed154

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