Malicious PDF — malware analysis report

Static analysis result for SHA-256 653fba177e1c90b3…

MALICIOUS

PDF

75.1 KB Created: 2020-11-16 15:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 16bc172a79c9177eeac966151e036496 SHA-1: 105804d716f6e1622d50e03c624a96ffb2836c98 SHA-256: 653fba177e1c90b3f164489e92f15f2220ba22cfb532e513295bdc91de9cd2a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=saucony+powergrid+guide+7 PDF link annotation
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/texil.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2509958.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/f27fcd87aae47.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/06684b35-ee53-461a-81e5-88820d37c64f/cuisine_royale_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad076ea-40a7-43a2-bcbd-3c1523da7cd0/transformations_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b91399c-117a-41ea-8a02-253e16bd905d/siwinaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfbbbd1-ed37-4baf-9076-247faf81634e/84601237841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2476408-978a-456d-8cd4-e2cd848d1132/beginning_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507ef052-7b24-458f-b25c-88bf891422be/fivetikuzigema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c241729d-8553-43f4-a823-8e37a2644e1a/33477186344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea956f4f-00d7-4d54-acad-a2a36578233f/zuwolesat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc4f1ad-ab39-496c-a2e2-19c339ccc435/wusakawibufelogujurenumek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45ccc17-6f27-431f-9d6d-e2c651a29b54/64439177247.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_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 5408 bytes
SHA-256: e435e1d7252ee29a389c0c3594501143e605a975defc639b01c1ecc36446779b
font_01_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 13388 bytes
SHA-256: 813fbbcd0c402d3d319dad20003473b5cea39180a26e46edb66c120ef19e323b

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