Malicious PDF — malware analysis report

Static analysis result for SHA-256 6215cd6eabaa73eb…

MALICIOUS

PDF

82.0 KB Created: 2021-04-02 19:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0192109dcf037623bb6defdfd650759 SHA-1: 159c165a004d7a756d7907482723d434d1324aa6 SHA-256: 6215cd6eabaa73eb04fb6b591bf28b8784ec471618b9087874db16b883523a8a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://lozipotod.ru/strik?utm_term=how+to+change+time+on+citizen+eco+drive+watch+wr100 PDF link annotation
    • http://axecheat8.xyz/walking_robots_toysd7x94.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/fezobewevtbces.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/ccna_2020.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/how_many_ar_points_is_this_is_where_it_endstddxw.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/anti_bullying_posters.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/KiiqjgL/8031731672.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_to_fix_ld_error_code_on_whirlpool_cabrio_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/gcJMij9/xisalikakotifekukib.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/nifNgiK/tasuzas.pdfIn PDF document text
    • http://managerprogram.live/83627516501v6khl.pdfIn PDF document text
    • http://sallehq.xyz/323395511ng7bx.pdfIn PDF document text
    • http://bovinuxunegobi.iblogger.org/87832968808.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/xGTigjn/zalamarimowe.pdfIn PDF document text
    • http://trysalon.xyz/sugadob3mt4n.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/65912796672.pdfIn PDF document text
    • http://piserujirabubam.epizy.com/cambio_climatico_semarnat.pdfIn PDF document text
    • http://zerason.rf.gd/72148748124.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/80572452113.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/ch_10_maths_class_9.pdfIn PDF document text
    • http://sodebaxekigefip.rf.gd/free_english_to_bangla_dictionary_offline.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/99263978805.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_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 5500 bytes
SHA-256: b190e68e86a41495517c13b27e9a13bebcafc08fe08d1e59386528d9813e0ba9
font_01_sfnt_off00011224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11224 11856 bytes
SHA-256: 5767f4eec525867320cbdf20af0693297f880a02c847b8f859c8409333c0a102

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