Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f4441270374ac1…

MALICIOUS

PDF

65.2 KB Created: 2021-03-16 14:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f5baeb4222a370bdd55d612e22e0991b SHA-1: d7c54bec5737be31f3d392b0144035c31e8e02ae SHA-256: f2f4441270374ac17cae11abd4efaf9436fa172b44a1f2a945f7e6388309c548
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'mezovuduw.ru' and disguised as a tiller manual, suggesting a phishing or malware distribution lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting, designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=mtd+huskee+tiller+manual PDF link annotation
    • http://sodalabs.pro/sedevukod6ebsq.pdfIn PDF document text
    • http://lg-supportteam.com/poweredge_r440_rack_server_datasheetti55e.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/9ve9jjP/player_potentials_20.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/geramiwaweroxolototaxogauplu3.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/ib3SNX3/6570681565.pdfIn PDF document text
    • http://obmenkalnr.online/vuvakebutogojalanulopaxbz0.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/jcYijwe/stickers_de_among_us.pdfIn PDF document text
    • http://topstudy.fun/wigesevakufopisotuxuwpk9ay.pdfIn PDF document text
    • http://fogugevup.22web.org/15126645553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gavomowiwolaxu.rf.gd/service_contract_termination_letter_sample.pdfIn PDF document text
    • http://fatewazut.epizy.com/32773028638.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_cec73d19840e4c8f8e187aded14b87ba.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_6faabed4f01443c68e7ad255097aa869.pdf?index=trueIn PDF document text
    • http://xibezesod.epizy.com/uppababy_vista_rumble_seat_henry.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_967c923c2f8f4bcdb2a5e9b1d9a44a7c.pdf?index=trueIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_1d69910f22ca40708ae4ceaa6dac52ad.pdf?index=trueIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_d7590e3f69824256a15799b006a04495.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_e14cc0243b844f84a6b3023f4de92405.pdf?index=trueIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_7fd84e29184a42f2866bcc117e359abf.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_off0000c3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A2 5136 bytes
SHA-256: 1097663fbec0d8c2559bf94d11f095735b3fd7fdeccedbd59e2f4d9b9e890a98
font_01_sfnt_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 10120 bytes
SHA-256: 09f1d436294dce06185bdfd1c8c36f3a631811dda708ef8473f7138fc51dbf59

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