Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ce9eec8f1d0d48…

MALICIOUS

PDF

76.3 KB Created: 2020-11-24 03:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eec2444e7b8744b783e4921e734a1d28 SHA-1: 453ec68b6f152f29d273c462b74ef91fcb2261e1 SHA-256: e2ce9eec8f1d0d486cfe4b63abd63a4cf3c354db721809b159bb5d5f4951785a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=frontier+of+inclusion+apush PDF link annotation
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/860100.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/2373773.pdfIn PDF document text
    • https://xogatavuk.weebly.com/uploads/1/3/4/6/134629599/1d0fff751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5fb5b875a5fa0.pdfIn PDF document text
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/mewup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f95fd018977e.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/dokivilebuvixubojapi.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/7528343.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/fe0f6405-b647-4480-8b27-0ef94defd6ca/donuwavinegenus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a176587-17ce-4f88-965b-a06e25edfa17/47939885745.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/chikou_span_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b84b11d-e0fb-4bde-9cfb-76ccdd6ca435/skitarii_codex_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad34fda-8449-4636-b249-d047a7e33e57/fofadijeduvulimuke.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 5060 bytes
SHA-256: 297e058e1537fb22b514be1a066324cc5dd28d0ed0881bd7a06d249c8a3edca7
font_01_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 16668 bytes
SHA-256: 95c09529c268dbb2a8c7d1106059680b8eb85eda5a13a685dd03a7fbfbb268a3
font_02_sfnt_off00010dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 16488 bytes
SHA-256: 9c48ffafd3052345cdabcb4f8c5fa7b27fd22a20d0dd75056c05be27bd210fac

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