Malicious PDF — malware analysis report

Static analysis result for SHA-256 f886108199d1adfc…

MALICIOUS

PDF

72.4 KB Created: 2021-06-12 09:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3ff2ba0f4835740c20a81231a74592 SHA-1: c1022a9b9907962ba295f60d513a0f1078ca5e63 SHA-256: f886108199d1adfc86bcb46cc6ea36a867feee7f8bccc2d91748e7b47bd30ee1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to 'how to insert pdf in powerpoint 2007'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, and ML classifiers and ClamAV strongly flag it as malicious, specifically as a phishing or trojan variant. While no scripts were directly extracted, the nature of the embedded URLs and the heuristic findings suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://synerhu.ru/pbw?utm_term=how+to+insert+pdf+in+powerpoint+2007
    • https://cdn-cms.f-static.net/uploads/4405467/normal_6065dfefb6a8b.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/fobopovaredorowalufi.pdf
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/5267148.pdf
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/gabenivaz.pdf
    • https://cdn-cms.f-static.net/uploads/4411479/normal_605136bd7c16c.pdf
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/zumobidinepem-winixe-lepazanewam.pdf
    • https://cdn-cms.f-static.net/uploads/4366022/normal_6049f20a1f174.pdf
    • https://cdn-cms.f-static.net/uploads/4485435/normal_60c1cb840d6bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c5bd7e68-4200-4e30-8a6d-a2aadba7c041/2003_saturn_vue_transmission_fluid_check.pdf
    • http://ronakiko.pbworks.com/w/file/fetch/144537846/gta_san_andreas_cheats_file_download_for_pc.pdf
    • http://gejigavowule.pbworks.com/f/complete_the_sentences_with_the_short_present_continuous_form_of_the_verbs_in_brackets.pdf
    • http://bupataved.pbworks.com/w/file/fetch/144741732/81568784935.pdf
    • https://uploads.strikinglycdn.com/files/9ad66a8c-8ef6-4d64-b4eb-d4b959702c2b/tugubebegetenidivedoko.pdf
    • http://fuzujufod.pbworks.com/w/file/fetch/144662988/what_were_the_12_labors_hercules_had_to_do.pdf
    • http://zekodunu.pbworks.com/w/file/fetch/145167822/37977267624.pdf
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144497331/comic_que_tipo_de_texto_es.pdf
    • http://nosegawibaso.pbworks.com/f/41317499345.pdf
    • http://kejuziz.pbworks.com/w/file/fetch/144838827/lelazoxopimagafoteniso.pdf
    • http://wiwedano.pbworks.com/w/file/fetch/144631065/26109586084.pdf
    • http://ximusutoj.pbworks.com/w/file/fetch/144695619/59357888790.pdf
    • https://uploads.strikinglycdn.com/files/c4f8871e-805b-4f86-855e-16c683f6e6e5/apple_watch_series_6_ecg_app_review.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_off0000de6e.bin
ef1b33623bb27d715f0cb2fa4f929bf8ad2998e94578ba5244ca1aa58499662e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 5200 bytes
font_01_sfnt_off0000f04e.bin
14f458a52979631c1195aef2579078dd9561132b0515f5898d93682b3dbb4ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 10584 bytes

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