Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da277dc13921c98…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 09:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b910020fc6730793425f46b1f8a2bcc8 SHA-1: a9866b692752073cdd919b6a5d0be391211cc5fa SHA-256: 1da277dc13921c982dfa3e2f5da2cab541238010a565e2df7172e89dc9b16e86
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or phishing. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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 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.
  • 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://lozipotod.ru/award?keyword=pan+card+application+form+for+nri+pdf PDF link annotation
    • https://cdn.sqhk.co/xedasuzefer/gcghi3X/nice_button_up_shirts_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/jfuhdih/best_battery_operated_light_for_closet.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/797932.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/bostadsbidrag_blankett.pdfIn PDF document text
    • https://nusikunamapuger.weebly.com/uploads/1/3/0/8/130874430/kipesuxubej.pdfIn PDF document text
    • https://sijujufe.weebly.com/uploads/1/3/4/6/134696532/ridulotojadaf.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/a179ed4dae7.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/Thhg0ib/lg_g7_android_pie_features.pdfIn PDF document text
    • https://zematewisa.weebly.com/uploads/1/3/4/8/134897668/4226246.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/a9c13c1a8.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/ct9ifjc/baixar_hamachi_gratis.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/80374982046.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/0dc5dd4f741a35.pdfIn PDF document text
    • http://jevijuratovate.22web.org/11270038753.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/juzerevuzafomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubelifijam.atwebpages.com/gosekumaximemixenejunup.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/ada_guidelines_2018_hba1c.pdfIn PDF document text
    • http://punefururoxifep.epizy.com/40842888010.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/feleloxixovedet.pdfIn PDF document text
    • http://gijomifede.rf.gd/2257603499.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/engineering_mechanics_or_mechanical_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/ishq_bulava_song_webmusic._in.pdfIn PDF document text
    • http://mulizin.epizy.com/change_management_john_kotter.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_off00010b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B73 5124 bytes
SHA-256: 500390d77b935655bf72428a977ded29a7cf483e85c8e4d99df8a56cf02e3d92
font_01_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 10972 bytes
SHA-256: 49c30108c711d1a4756ab2fa9c7f36bc4d0f25bd88a6789fa872d325de53dad9