Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfacfe85ce549fe…

MALICIOUS

PDF

60.5 KB Created: 2020-11-16 13:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5555cbe94892dbfb7aef98015e9bc64 SHA-1: d6887ea9f8c3493a61f3576a26e304a42036fd0c SHA-256: 3dfacfe85ce549fe795952283eba945203fdb3b2befdef40b0f8a226ee3f7884
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites, masquerading as a technical manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=yaskawa+a1000+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443372/normal_5fa3a3935a85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5fab275802670.pdfIn PDF document text
    • https://kakezilek.weebly.com/uploads/1/3/4/4/134401463/064b8b545fb1fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f96bee0a6ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_5fa66509010ff.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/45c1f91f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f88a44256fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f9f9d98f3f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_5fb031a266243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8886c5915e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5faebfbc10ffa.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/40663052-dda7-48d0-a952-a00c6bc3efce/mills_eagles_all_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990bdf65-07fd-4c68-bf07-4ed5519709a8/sasugefuripejexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cb2cfc-9d7e-4199-bc47-46f351abfcd3/fewamafosatoresenapufama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca05b5f5-96e7-4d0c-9c7d-155265d391d0/51828976166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468e8ed1-bc21-46ae-a970-50a1b55c2dab/pdf_touching_spirit_bear.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_off0000b693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB693 5400 bytes
SHA-256: 17cdf3622e6e6bf65adb83c9de97f9036360db0abbc4b121765883d41e9af91c
font_01_sfnt_off0000c8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FF 8236 bytes
SHA-256: a7b21f6339c964e5e9b9077b0c69d4321074e192e2684fbd4015e5da9107a5e9

Open this report in the interactive analyzer, or submit your own file for analysis.