Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abe099bcabd0d2c…

MALICIOUS

PDF

75.1 KB Created: 2021-03-09 21:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2ca6e20d52754080e1682da387254e69 SHA-1: 7dbb642743c7308f812ee5bae195f0d8bf093c3d SHA-256: 7abe099bcabd0d2c310259a1044f6944ac5c6907e62ed1fb656ce8e58b727c06
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The primary purpose appears to be SEO manipulation or distributing secondary payloads via the numerous linked PDFs.

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://ponafet.ru/award?keyword=sistem+sanitary+landfill+pdf PDF link annotation
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/tubuzadut_zanefuwanotomow_romataz_ludegejumak.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/hfgdPhh/35748416290.pdfIn PDF document text
    • http://karnaval.host/nozotuzemafemenuzifivurq3ss.pdfIn PDF document text
    • https://mumilupoj.weebly.com/uploads/1/3/5/3/135351188/fivusemave_ximimumarojuz_gujajituxozada_farodatixi.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/hhdN2KC/11092752320.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/jedgqBP/nfl_redzone_dish_network_channel.pdfIn PDF document text
    • http://dream-stat.ru/john_deere_410_backhoe_for_sale_near_mevdhhj.pdfIn PDF document text
    • https://cdn.sqhk.co/dejenuluzew/gjifGic/cat_run_game.pdfIn PDF document text
    • https://fiwitoritare.weebly.com/uploads/1/3/4/5/134582968/zeduvifikebagutaku.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/8178054.pdfIn PDF document text
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/ca775a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_2e4e87a3ff4e40f2889156f8c2bf8ba4.pdf?index=trueIn PDF document text
    • http://rawurokavuxari.rf.gd/do_chick_fil_a_hire_at_15.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_99e0245c0aba46b8b564b0c01d0dab58.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_102f78a9bca94ac8ab178e4786b9ef4e.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_15d79a9ae0b245349b1ddccf32cde315.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_a856d290db5642b48a3dbdb52cefcb16.pdf?index=trueIn PDF document text
    • http://xenuduximowub.epizy.com/viruxiwaputefixisi.pdfIn PDF document text
    • http://duzixaludu.rf.gd/dewewukedugelolamuvuman.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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5392 bytes
SHA-256: d8eecf111b321fafa72638c977a91f491b69067cb1860f815d9cdead70f3fc0d
font_01_sfnt_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 10220 bytes
SHA-256: 9afc9e54d6096283bbd33002fcf1d05f19f81753330f925784d20f2f1465071d

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