Malicious PDF — malware analysis report

Static analysis result for SHA-256 1760034c5de9ee7b…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 13:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 33a582d6ccbf57f40561e3910276afb1 SHA-1: 5cd8b3e035baa2b5544abfcea8436573d1a57490 SHA-256: 1760034c5de9ee7beb1a5a34e3ded54bc2ff8de2237fba02737b8330afeb17aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The document body, though garbled, suggests a lure related to internet connectivity problems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=why+won%2527t+my+netgear+connect+to+the+internet PDF link annotation
    • http://lp-consalt.ru/lonolesutomemtuoso.pdfIn PDF document text
    • http://antonio-ita.space/341989415433tq93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_5fe9358c560af.pdfIn PDF document text
    • http://futup.ru/77783911693ylq6t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5ff8ed1f7d128.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/7jbicgg/transworld_endless_skater_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/hhahijd/local_2_player_games_on_xbox_game_pass.pdfIn PDF document text
    • http://life-news.tech/rakutikavoruperdxlzh.pdfIn PDF document text
    • http://bizbize-yeteriz.org/baldur_s_gate_enhanced_edition_portraits_packmts58.pdfIn PDF document text
    • http://raisinsapp.club/how_to_describe_sunlight_through_trees07scb.pdfIn PDF document text
    • http://carbackseat.site/cursos_de_ingles_online_gratuitos_para_nioswcqwa.pdfIn PDF document text
    • http://aycotoro7.xyz/mafiraban8c4s.pdfIn PDF document text
    • http://all-casino.xyz/what_does_daydreaming_meannh5np.pdfIn PDF document text
    • http://trudogoliya.online/jububuvoxokugamabuzupifakrhyb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/562a329a-531d-4108-871b-40a1ae814def/fuwogalejimadosudixen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd286f7-8d87-4e3b-a35c-d491f2d7e5ce/8608671706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c367d64-c3c9-446d-8daa-c9aa3ee04291/top_electrical_engineering_universities_in_maryland.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_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 5244 bytes
SHA-256: 53c4267bdd7a4e3c141a2a3d335e3e73848ca9496201a7835bd85ab388a5c61e
font_01_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 10688 bytes
SHA-256: a0f46d7005070f775d68da6245e1cc0cb692b82aed607461f1527d7db5fdb8f2

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