Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b294b99057354e6…

MALICIOUS

PDF

80.7 KB Created: 2021-03-25 14:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005463da730f4939ebf504bd8b05bbb3 SHA-1: 7a8b3e4e72ee6ad39d7c471222d9efa75813356d SHA-256: 9b294b99057354e6281271ea94fa9f1865411bb2b6b4acb13d9ed96f20d2c759
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=ibm+aix+interview+questions+and+answers+pdf
    • https://cdn-cms.f-static.net/uploads/4367279/normal_603d8b5407efe.pdf
    • http://pumorux.medianewsonline.com/govitarosefoxeditaw.pdf
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/79359a0.pdf
    • https://cdn-cms.f-static.net/uploads/4481424/normal_600ed7ffc38c2.pdf
    • http://zevibeponakat.getenjoyment.net/evolution_of_social_work_profession.pdf
    • https://xovatikawe.weebly.com/uploads/1/3/4/7/134726086/ea6e48439b6bb.pdf
    • http://miromawetibikew.mywebcommunity.org/lotezuleterufamajibepu.pdf
    • https://wuzesitawe.weebly.com/uploads/1/3/4/7/134733123/0ec2ff4830.pdf
    • http://potuxoposutu.medianewsonline.com/ball_bearing_failure_analysis.pdf
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5ff3e7ffb0cc6.pdf
    • http://pemufosapakem.mypressonline.com/perbedaan_tanaman_c3_c4_cam.pdf
    • https://vedisowokiwovos.weebly.com/uploads/1/3/4/7/134767265/448aa501eb.pdf
    • http://niwopofe.scienceontheweb.net/54646680364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/18262804-4a70-439c-8242-d64a485f082c/wonder_palacio_book.pdf
    • https://uploads.strikinglycdn.com/files/7d61c4ae-c273-4ca1-abaf-c4fb2720e0a8/delonghi_leaking_water_underneath.pdf
    • https://uploads.strikinglycdn.com/files/ac73746c-4e78-47a2-8b9e-ef5256cba8a8/74092350615.pdf
    • https://uploads.strikinglycdn.com/files/8f8ad38b-921b-43ff-81b6-6f63d2d5df71/kenmore_coffee_maker.pdf
    • http://gozidonozali.myartsonline.com/73576031918.pdf
    • https://uploads.strikinglycdn.com/files/dd4e9899-773f-48ae-984d-87b67fc91059/bidatukasinu.pdf
    • http://kavuduvolilazod.myartsonline.com/busuvapetagutuvibidenofev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd1.bin
00d68ca3b054e46fdb06ec99b96bd8f83b5d46de742f3ad9ce8b5b9a7340d751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 5580 bytes
font_01_sfnt_off000112c0.bin
fecf902223618bc1529d6ea0c7d471282b7611bd13828f517251f91ca72bace9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C0 10544 bytes

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