Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e65ad6bb54fbbe1…

MALICIOUS

PDF

61.7 KB Created: 2020-11-10 08:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e3d4bb2b2c894dffcce0ba8f8f65f47e SHA-1: 5c80b9ab53669b3167f45b0e8f731391948d67f8 SHA-256: 3e65ad6bb54fbbe1e97235e7be215245baa044b57e339864b72a95ab73c0d8b5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The document contains a large number of external links, many of which are hosted on dynamic DNS services or link farms, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The primary URL, "https://traffking.ru/aws?keyword=brown+v+board+of+education+icivics+answer+key", is presented as a search result to lure victims.

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://traffking.ru/aws?keyword=brown+v+board+of+education+icivics+answer+key PDF link annotation
    • https://komimuvupelogi.weebly.com/uploads/1/3/4/3/134312664/kabivus_dobuva_kafatulamid.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/1540784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5f981a9595d48.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/faxisija_nabom_begedi_tibopixedivo.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/9d7020d5c.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/08a4c67df00b.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/80e6dd14-c9d4-415b-ac45-645e047910f6/ziluvuvumudufepewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beeb3dd5-9494-4568-9ff7-e4b61076922f/32014990251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3de9130-c89c-44d8-9ce4-a4f7cb7f9834/watogexijopunaraxexuvire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01ebcc0-3161-4e12-aebf-26c9b7a3cd67/bosexelinipivumawakurep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4880bf99-f055-4c25-a00a-b961872fef77/rebecca_st_james_wait_for_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fb252b-f864-4679-9c71-23453148c0c1/tuporodaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7385eda-5a08-4c2f-b9cf-196d7d82aed6/65118173581.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_off0000b39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39E 5488 bytes
SHA-256: 064e72d4d3cfaf3c6425f4a2c186fb3eeaa310d4322656662fa67bf104228686
font_01_sfnt_off0000c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 10736 bytes
SHA-256: e692e2e157f042ab28cdbea1af4f63205959526374df0ee7e96ce12f88e8ed80

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