Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01a6f471039f2fa…

MALICIOUS

PDF

83.7 KB Created: 2020-12-16 14:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4c6618f07fd4fa83e63ead5370b63c2f SHA-1: 16d173910c16dc2786b5741df9adcf59e3ae6fea SHA-256: e01a6f471039f2fa9f8a9c0dc430fabd9d96ecd6129feca9de161d28d960a92b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and the presence of an external URI points to a suspicious domain. ClamAV detection and ML classification further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=women%2527s+chef+coats+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461201/normal_5fa7286bbe912.pdfIn PDF document text
    • https://bimebupeku.weebly.com/uploads/1/3/4/7/134715010/7335238.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/5fc3814cdf132613bbce2363/t/5fceef48b8233e30df9e5d66/1607397193309/ikea_hours_mn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdedf99b1ed035389f404f/1606282745535/87005353057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d632571-6499-4919-b73f-cd753d427914/gixazazuluj.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/13937285525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dc253c-782c-497e-a29d-e7d408f90ff7/lemasugepirisoxekuku.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcea712ea509e4fb82f859a/t/5fd08d9fa91a8d24337d9355/1607503264140/79702626365.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/54611349232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6911e04-c5de-414e-b6cb-087586674fb6/55407542668.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e144ab79f442f2430649/t/5fcc9dc35d2e6f3bda37c89d/1607245253125/photo_collage_video_app_iphone_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5336480-98c1-4b54-8fa0-15826d2c7794/86950640059.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61159ee0f32b874b6fe6/1606377751081/54910708870.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_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 5136 bytes
SHA-256: f3d25dfe172ea6b0e185b70986fe84a1d39ebfb3f12bcf41bd4afd9b5fc5b4f8
font_01_sfnt_off00011906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11906 12480 bytes
SHA-256: 7c99ad5024b5ea74eba7deb8a0f7691a85825abfc03ad9ef3bc93b57384d3de2

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