Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9097e28cbc7b6ac…

MALICIOUS

PDF

87.3 KB Created: 2020-11-27 19:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8adb57a1850c2dd54d95a43a5e0504ec SHA-1: d6016412a16e125a36575f8a4d53fe9f02df9fae SHA-256: b9097e28cbc7b6ac22776b3d1cb0525f166480889e6580d444a678edc5d80654
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=thri+kreen+5e+race PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501041/normal_5fba7cb0b6269.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/2804756.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/natozasajerizow-kidatub-fisemanumutid-rajebodelovisaj.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/dawutazeguxovep_negazik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5fbc322a9203f.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/9504046.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/zakunafu/18319714380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b076d57-8072-4978-8dc0-f6aed9654598/nivebedafelirujoje.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/tom_steyer_is_married_to_kat_taylor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c695c7d9-0c2d-4cfd-bc01-e5d87142093e/lisiwazadatemedovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646d32fb-7174-46a3-abe4-8ceaee336411/24103113433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e85381e-c506-4d06-aff0-2fb8d5506000/kelobapezesujezuwojidagum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497ca977-ea0e-45bd-82e1-cecb5f0a9afa/pogil_ap_chemistry_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5727076-a105-488b-bb7b-f66d25ef39bc/44849750576.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 4816 bytes
SHA-256: 0d8893a8c7d3526ff63ab3c41507cc9591b8f7c5a78dd724f5b6edda4bdc414d
font_01_sfnt_off00012b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B31 10908 bytes
SHA-256: 9b25717b532beafa1b99624aa0e02b97df2d938cf698b65ae329525662775d1b

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