Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1c9e0e7b7038c3…

MALICIOUS

PDF

64.6 KB Created: 2020-12-16 01:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d31796c757ee79464b1a211b80264ab5 SHA-1: 92924f5ebeaa671255e1d90da4bb228247ca81e6 SHA-256: 6a1c9e0e7b7038c349354d00c973022b3a733032c17ecbe80f88388dd82c2d5c
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://trafffe.ru/strik?utm_term=41%252F50+shrimp+calories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fbd246331604.pdfIn PDF document text
    • https://giginepa.weebly.com/uploads/1/3/4/3/134389182/21e7578a0253b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_5fc35265175a0.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/tezejosaxitoso.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/mesabipufuxesav_niwavop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5fa7fec2b3833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f7e1ef22-ea08-44f1-812a-e8e477e9c44f/sans_20_critical_security_controls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2638b9-2f7a-4fe1-976e-361dc428c145/89032970206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f00be5-2cbc-438a-b336-1c570c07cc29/33661699207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073f6eda-633b-48a2-b0cd-38fcb7afe2ff/real_steel_hack_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cdeab6-7ff0-4f04-bbe8-baf06bdef466/46947942741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca15a8c-cdec-40f8-b437-d556509c837d/pelun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebb717d-4b7f-4c2b-9a42-0d5765c54555/lukarifurojinepulefupom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FD 5124 bytes
SHA-256: 12c79cde2c21aa2adaec7c4a20971fa3f276f30daf867edb4619bfa6a7bbca4e
font_01_sfnt_off0000c461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC461 10552 bytes
SHA-256: 63cfc2bd913fbf997259783ce5284b1407865dc58c86bc2e3a9328adf7337d5a
font_02_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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