Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0d96b110cf5f70…

MALICIOUS

PDF

78.8 KB Created: 2021-02-19 20:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 62e633fc64c76cb67b7a449c608fa48f SHA-1: 239028de259b33b521412f67b3ab38a203953345 SHA-256: 1d0d96b110cf5f703d6353378097f41111e442cba7107c5048280daef6e144f0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a machine learning classifier and ClamAV. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed financial instructions, a common tactic in business email compromise attacks. The presence of external URIs, particularly one with UTM parameters, suggests an attempt to redirect the user to a malicious site. No scripts were extracted from this sample, but the overall structure and heuristics point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://druttle.ru/123?utm_term=sony+wega+tv+standby+light+flashing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fe7614853e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/oiigdjb/zarchiver_donate_apk_download_0._9_1.pdfIn PDF document text
    • http://markettop.pro/family_tree_chart_genealogyxez0v.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/4Bheibe/ginakedumosaludoto.pdfIn PDF document text
    • http://legrand-spb.ru/kosefolsjei3.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/mhhjeig/digital_marketing_companies_list.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/87131167009.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/pCiigeJ/zofataba.pdfIn PDF document text
    • http://bomufofo.iblogger.org/how_to_boarding_pass_spicejet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443608/normal_5ff4b191f03b7.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/ii8RjeG/dcs_modern_air_combat_trailer.pdfIn PDF document text
    • http://newser.site/zekubipopawozagecwml3.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jnha0zG/stickman_3d_racing_popular_3d_run_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jgcFnpi/nautical_lifestyle_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozosotozaroxi.rf.gd/48392906232.pdfIn PDF document text
    • http://vasiruduwoju.epizy.com/fibebuzovilu.pdfIn PDF document text
    • http://goxafufi.rf.gd/paint_shop_pro_2018_free.pdfIn PDF document text
    • http://latowetutut.epizy.com/72501062063.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_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 5568 bytes
SHA-256: 51919f438ab7abe9a9a5484147bf84523fdf98065d06dccba0ff2f70a1357c90
font_01_sfnt_off000108bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BB 10856 bytes
SHA-256: 8c1c958fc94a42c9fad28ab95ef9be8b06f3009e86b00a09f79cbdb24ba056bd

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