Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cacbe25b2b3620c…

MALICIOUS

PDF

69.5 KB Created: 2021-03-15 23:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8dd6a90e82f3998e59efa89957049d68 SHA-1: 3351c170f0b2eb5bc81922727c532b882dfdd2bc SHA-256: 5cacbe25b2b3620c98d0c276ac7a0258fe56b24214015f0601130313b19a6a31
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URIs, with one notable example being https://leonvi.ru/award?keyword=biblia+de+referencia+thompson+pdf+descargar, suggesting a link farm designed to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://leonvi.ru/award?keyword=biblia+de+referencia+thompson+pdf+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377912/normal_602f47f569ce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_603e5c5b1e6ac.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/sarefadito.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/litudagitorujav_sefebapidiso_pojobulo.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/6942839.pdfIn PDF document text
    • http://domainlimax.xyz/sodasegomoxorotddty.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/bejekoropowekaji.pdfIn PDF document text
    • http://tihefers.online/mitinawijykhn.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/wakakumumelifadona.pdfIn PDF document text
    • http://xrootunited.com/447979515430au91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5fe723cf7658e.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/49715075264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/seth_rollins_net_worth_2019_forbes.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/82420297435.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/66815865689.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_086ef4938b5948c7ab05402c64b640a7.pdf?index=trueIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/silaseb.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/phet_vectors_simulations_lab_answers.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_662091f3e8dd402d937feb69321a9770.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_fdca870edbcb432d870776a2499dce9f.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_d0fab687ca39479880aae79ac03c2d4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetituri/titan_440_impact_paint_sprayer_price.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_0bcc5da0e8c44ccc95f023fb57325553.pdf?index=trueIn 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_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 5760 bytes
SHA-256: 47cdc15963a8ac498d7f3569d623585263ca16dc24afdc626d7ae62c64f07877
font_01_sfnt_off0000e356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE356 11396 bytes
SHA-256: 52cf8ea86942544f5a5e769c1ea43baf664933f6c9cf843e5b88cbc9c0e82edc

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