Malicious PDF — malware analysis report

Static analysis result for SHA-256 5543b22e49e4a93b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-24 05:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5cc7e17192eeebb362e782388cc6d766 SHA-1: 456fab760616155cd4de69dbebe65168c210d871 SHA-256: 5543b22e49e4a93bb377d39540443e0644ab3d553ee52628a7d8ab7e17768793
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme to distribute malicious content. The embedded URLs and the heuristic findings strongly suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/123?utm_term=casting+crowns+new+album PDF link annotation
    • https://cdn.sqhk.co/samanugutu/hfvRmii/virus_infection_simulation.pdfIn PDF document text
    • https://cdn.sqhk.co/felatadag/3ZYijhW/best_hard_boiled_detective_authors.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/jafaburalevagi.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/2262465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fe3a0289be12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5ffdca4acb4a6.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/giwajomibigip-kozitelago.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/Kj8mfjc/16801235773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5fcd98814bc82.pdfIn PDF document text
    • https://jerejadudet.weebly.com/uploads/1/3/0/7/130738914/983548.pdfIn PDF document text
    • https://kebomekol.weebly.com/uploads/1/3/5/3/135349545/8047b002e6b7d.pdfIn PDF document text
    • https://xesusilinani.weebly.com/uploads/1/3/0/8/130874458/zosetidupol_jifudasukovovux_kunutis.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/XHFfzjc/grand_theft_auto_4_cheats_ps3_tank.pdfIn PDF document text
    • https://jazejuvo.weebly.com/uploads/1/3/4/4/134439384/9362502.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/julixexadogezez-janafepanares.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/detul-bamedoxudixe-fosukusitanise-muminagojepo.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/c3eca36f-dd87-4728-b6d2-ea60560ea688/economics_mcgraw_hill_online_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c76bd95-3d0f-4da9-8259-1f412212940c/xurifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a2240f-fd3f-4750-aaba-3f9c38e44592/26121076901.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_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 5256 bytes
SHA-256: 1c44977cc96f08e3e75c277fd44758425983d80abc54143f6943795bdd545d67
font_01_sfnt_off00010196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10196 11088 bytes
SHA-256: e0fed53f966ec19f380d5218e541067683808fcebd4e8d8ee62cbb629b2ef4b5

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