Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af564357bfe7462…

MALICIOUS

PDF

64.4 KB Created: 2020-11-16 16:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 464e478679ad7c151bfc966bc1b14b69 SHA-1: 1530af2c8bbeef2b9844fc4fbb80038189b4a345 SHA-256: 3af564357bfe74622ff5774624b3021a1812a9108fecb2944c064252f1a30d77
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://trafffi.ru/123?utm_term=elements+compounds+and+mixtures+worksheet+answer+key+part+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8ca021befd5.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/5229935.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/a6c7a421-26f3-467d-afde-490c91221e42/6501907634.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/ny_flyover_ww2_airplanes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b425ab75-735d-4727-beb9-3421f2d87b9d/petfinder_columbus_ohio_cats.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/alfalfa_planta_medicinal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a14bc5c-51ec-4110-bc12-7ba79fa9cda6/xixovojowuxapolugedulesaj.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/23646959699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5354e22-393d-43d4-8e83-e248bf277e97/1965_mustang_wiper_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/ruwuzixawaruvagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38047d8a-3265-482c-9d4f-b5856d510c87/birth_charts_cafe_astrology.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/mcdowell_high_school_transcripts.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/50106392979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053d5275-516e-4e2d-a897-c5b31a93aa73/46883314912.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 8

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_off0000bae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE2 5648 bytes
SHA-256: d8ed147b0ac1ebd48ca0677d40b9ad879da056aef806fcb65f894ea5f5ce5baf
font_01_sfnt_off0000ce0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0D 10488 bytes
SHA-256: 17c4628fe9512d949ee91f1c4094718996fd291d012459c1b5dce941b18307ed

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