Malicious PDF — malware analysis report

Static analysis result for SHA-256 8224bd8f3c3280fb…

MALICIOUS

PDF

72.2 KB Created: 2021-03-19 18:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 613d04cf913b7162110a9cd0e2a71b94 SHA-1: 245066c8a0be7814d224dcaadf30aeffd79a88db SHA-256: 8224bd8f3c3280fb1009fe7935c1b34661a8ed3d33dabc2804c65684e3ad1d2c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The PDF contains a large number of external links, suggesting a link farm or redirection scheme designed to lead users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pelibifir.ru/123?utm_term=ndc+engine+bearings+catalog+pdf
    • https://cdn.sqhk.co/tevosenijosu/jje1K7z/best_pickup_truck_to_buy_used.pdf
    • http://getsol.xyz/irobot_roomba_980_robot_vacuum_reviewmcbno.pdf
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/kodunenagof-xawevi.pdf
    • http://bujufamamaw.22web.org/why_did_northern_states_favor_tariffs_during_the_early_years_of_the_republic.pdf
    • https://cdn.sqhk.co/lovuzegonu/igiaiig/98533869949.pdf
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/8c826e09.pdf
    • https://doretufokisa.weebly.com/uploads/1/3/1/4/131438244/mubofi.pdf
    • https://zekaxuwamawebi.weebly.com/uploads/1/3/5/9/135961115/2701496.pdf
    • http://olx-delivery.cc/ms_word_2010_notes_in_hindiszm20.pdf
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/8485434.pdf
    • https://cdn.sqhk.co/molodomo/dhbmhap/7441480156.pdf
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/71e483034.pdf
    • https://cdn.sqhk.co/wagomito/T53NggT/55194025887.pdf
    • https://cdn.sqhk.co/wepunajexiju/f5jfrje/76799354911.pdf
    • http://drovazvenigorod.ru/55130650730cu365.pdf
    • http://udilische.club/71352301350koxcu.pdf
    • https://cdn.sqhk.co/subesanodag/fGkzTZm/cbs_sports_fantasy_football_mock_draft.pdf
    • https://cdn.sqhk.co/budatumibowu/iaiiOgV/clock_face_template_free.pdf
    • https://cdn.sqhk.co/jaziwuke/hQjkh9g/xarif.pdf
    • https://zopamege.weebly.com/uploads/1/3/5/9/135966764/wamepemat.pdf
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/nufos.pdf
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/34d58480b9b1d.pdf
    • http://prizyivnik.ru/how_to_find_maximum_revenue_calculus61nq3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://goxuvimoludu.epizy.com/platform_wheelchair_lift_for_truck.pdf
    • http://lobakixadob.epizy.com/gadudarisi.pdf
    • http://nibosifex.epizy.com/concierto_barroco_alejo_carpentier.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_off0000dd83.bin
f28a32dc6fd3b50172fe2c643dc91e5d7d3b16999d8abb2eabcca11564af286d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 5432 bytes
font_01_sfnt_off0000f00f.bin
41e7678370641f806d886b52eec929f49c47164937296b4340b3ee32bca3bd31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 10132 bytes

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