Malicious PDF — malware analysis report

Static analysis result for SHA-256 4222e363c13d67b0…

MALICIOUS

PDF

71.1 KB Created: 2020-11-22 08:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7bf8d58c37bdffa173486dc90d87914a SHA-1: 0feab84178a60cc86aca497946a34dfb7d2a589d SHA-256: 4222e363c13d67b0c255cd48f5c6d5ab4c28c1c10b045835077ff18f4d65522c
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 a heuristic firing for a link farm and an embedded URL pointing to 'traffset.ru', suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=hoover+carpet+cleaner+manual+f5808 PDF link annotation
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f904f7ad69d8.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/gerasejewo.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/d64b7a75-10ee-4870-bede-de73da993e0f/dragon_quest_builders_terra_incognit.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/sangean_ats-909x_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/lac_qui_parle_valley_high_school_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6497316c-1c76-4d3c-8f05-f6705e780dd5/gazukalemuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/reduce_file_size_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ed630a-b806-418b-a2b1-62b847541d7a/dojopuvekakigefadakuxesok.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/79511169538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe3af04-6a32-42e5-a4eb-fa10a152497c/93048663318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138058a0-1741-4af0-a416-d36edcec9c98/larojujeme.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/final_fantasy_x_sphere_grid_rikku.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/buku_sejarah_asia_selatan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD22 5296 bytes
SHA-256: 12fef03c67d7162dbf068677744908a2383aa3fff23adbec45a6c2217af19d6d
font_01_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 10116 bytes
SHA-256: 9412058e8527ec5e4ea2ddf76eed155c36b6742721c7046d8e37f57009783450
font_02_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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