Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4364617aab98078…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 20:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8e14e8c26e0d1f228267689ecac96411 SHA-1: f712bba3fc8445544cd1fa665e8729b16b603da0 SHA-256: c4364617aab980787682f6a019122cb054890f731f7a9ca0082d20034a27263d
226 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' specifically indicates the document describes new or changed financial instructions, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=what+was+ram+dass+diet PDF link annotation
    • https://cdn.sqhk.co/rivinodati/gcgd3gg/pictoword_level_427.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/Jw63jiP/assamese_new_song_site.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/ij09Lha/zezoku.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/Ahhifgc/josh_groban_o_holy_night_sheet_music.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/danobi-kafopimivizo-rijep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_603d05851f31e.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/babf6edf03628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fd30af1808c1.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/kWVcsbY/97534178705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467005/normal_5fe5042e91407.pdfIn PDF document text
    • http://registrat.space/2647081177d9l29.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/PLievI4/prehistoria_definicion_rae.pdfIn PDF document text
    • http://hookup157.site/birthday_images_hdo4n3i.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/f6e7311131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/779403e6-ec7d-4a74-96a0-a011a84309d4/kebomojexodikozinukewisir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b507598-68de-4245-a02f-66c91680a61f/760434280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dba317-5700-4790-bb3a-e33f527ccbed/unequal_childhoods_class_race_and_family_life_annette_lareau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d2d51b-9f83-417b-a499-a3a63fdb0de9/xanoguwa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 4708 bytes
SHA-256: 4a4d0869f282d322f6a12430b86617978e2e64922fc44ac2e869b2e61ca5ed11
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 10824 bytes
SHA-256: 9efda80549baccc2019701b9903829dc425984c68b146d5981417e5ea7fe6ea7
font_02_sfnt_off000133ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c