Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f266b26e915dc0…

MALICIOUS

PDF

76.7 KB Created: 2020-11-23 12:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 50593180858826c3a6e1a0e5b91dbf60 SHA-1: 14b44af376758980cb16fac4cbc4d5ad53317344 SHA-256: 91f266b26e915dc0277ff1d3697929c08888e2f5d891049ffd0d1c9f8662a208
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://traffking.ru/strik?utm_term=selenium+tutorial+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452199/normal_5fad69d61074d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fa7e17d5a9e1.pdfIn PDF document text
    • https://badikodaxalele.weebly.com/uploads/1/3/4/6/134698448/6788473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5fb6b8232830d.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/629d0d1a-238b-4d4d-b9c8-9c213c09a05f/giwisisologelozajeneril.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bekaboo_web_series_episode_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/50453104896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0259e4a1-6d16-4dbf-ad1e-09f7dd5f9b23/subufelibitatefigog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599e1ca3-162e-4e6d-9779-43a5ead7fe5a/13th_warrior_full_movie_download_in_dual_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462f14f1-f832-4325-b492-658e6c17eb1a/fatefesumulozonev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308f27f3-be39-49eb-b916-657cfc333984/jotabaradudaxuxejedope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f960111-bd8f-49ae-8195-755c4e66c86d/labifirarabakejejofawigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd83785-5c2a-44f5-8140-b55a20bc9b41/60453534315.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_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 4992 bytes
SHA-256: 929d84e9a1f8d2dd2b0104b2b242ce1256b618bcd8ef72daaa001f847938b7f3
font_01_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 11112 bytes
SHA-256: 13239b9b8d9e43e72247723203929b5ebebf8add70dead58e01ed906785283d6

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