Malicious PDF — malware analysis report

Static analysis result for SHA-256 8015ff0b88a7055b…

MALICIOUS

PDF

77.5 KB Created: 2021-04-19 23:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 761e913f12683ad220b93a46ced84818 SHA-1: 2022b5941b1dc13553e71b9c5d57dbf8b1db01f1 SHA-256: 8015ff0b88a7055bc2456d1e2dd1954005e7537309e8e6529ab9e753e0cdc4cd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing. The primary URL, 'https://seumenha.ru/strik?utm_term=netgear+n300+wnr2000v3+manual', suggests a lure related to technical manuals. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=netgear+n300+wnr2000v3+manual
    • https://cdn-cms.f-static.net/uploads/4418401/normal_603ed43089900.pdf
    • https://cdn-cms.f-static.net/uploads/4413975/normal_6021e97465c63.pdf
    • https://zapokeboxopi.weebly.com/uploads/1/3/0/7/130776852/efb818e78d07bf6.pdf
    • http://jolixasij.sportsontheweb.net/90157625135.pdf
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5ff971e9800f9.pdf
    • http://xeberul.mywebcommunity.org/pabepobexowefogisixerowe.pdf
    • https://cdn-cms.f-static.net/uploads/4479470/normal_6034329874e9f.pdf
    • https://gizizajavime.weebly.com/uploads/1/3/2/6/132695742/5036095.pdf
    • https://cdn-cms.f-static.net/uploads/4500186/normal_604e66e664cc4.pdf
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/tejore-wunaxiponabuj-tagadafozazes.pdf
    • https://cdn-cms.f-static.net/uploads/4426814/normal_6056da824819a.pdf
    • https://cdn-cms.f-static.net/uploads/4375909/normal_606068f31ead5.pdf
    • http://mosuxuvemuzuwex.mywebcommunity.org/gukokoneruwuvika.pdf
    • http://bokaxakoz.sportsontheweb.net/dapafofodugo.pdf
    • https://rusokakes.weebly.com/uploads/1/3/4/0/134016884/2291938.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/caf62afa-ce69-49b2-98f9-f0951a2d0a36/roku_2_remote_headphone_jack_not_working.pdf
    • http://ziwemasux.myartsonline.com/13960007068.pdf
    • http://rewuwuja.onlinewebshop.net/mufikorewo.pdf
    • https://uploads.strikinglycdn.com/files/c25479c4-8c20-4765-8d61-bf3818e83c14/ruledogojogemojimeno.pdf
    • https://uploads.strikinglycdn.com/files/23bf1ae1-5360-487f-ac21-0f4751290d12/89502064520.pdf
    • http://zagupijalixi.myartsonline.com/7420878768.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_off0000f2e3.bin
db932165be91b8938935d9954705adca3eb9a7e118c091762de06618a2ad339b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 5388 bytes
font_01_sfnt_off00010541.bin
32791b5fd678d4bc42cb8ccf45e10b2084401ff748d8819cda84c329cbf2bb7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 10364 bytes

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