Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cb6fa07fe1337d…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 18:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 463a102955672fb27e6e85fdb70632a3 SHA-1: c784c52a657f5d0975e54ec56dc30442817eb1ba SHA-256: a6cb6fa07fe1337d33742a5769c40eac92d1cf758613fcd8cabf147afd6bff94
146 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam pattern, where the user is prompted to call a number. The presence of numerous external URIs, many pointing to disposable hosting, further supports a phishing or malicious content delivery scheme.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/wix?keyword=greenpoint+mortgage+funding+inc+contact+info PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451206/normal_601268dd34564.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/film_cyborg_she_subtitle_indonesia.pdfIn PDF document text
    • http://xodulik.66ghz.com/49523819732.pdfIn PDF document text
    • http://wumozigasigupo.22web.org/the_skin_horse_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477886/normal_603e9f7d7c073.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/lerejalufomoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5fd108f9aa242.pdfIn PDF document text
    • http://mabobuluka.iblogger.org/biogas_plant_types.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://felowiroviduga.rf.gd/blanqueamiento_de_corales.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/16029131603.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_a9e5a71b5b1f4affbe13652c81a482bb.pdf?index=trueIn PDF document text
    • http://gorosojipi.rf.gd/gogudetiromux.pdfIn PDF document text
    • http://bakevojedu.epizy.com/zazejupuduximatorof.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_4e36b15386e5406381c3b579259b7f4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/informational_job_interview_questions_and_answers.pdfIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_b86c0c2ba41744eeb27f086b5d94706b.pdf?index=trueIn PDF document text
    • http://bowupezik.epizy.com/81712622956.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/star_wars_unlimited_power.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/type_b_android_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/kozefokiroxodeloxi.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5296 bytes
SHA-256: 2d1068682c8e7c14c367ee8e328fef137829eab95a5e6e3d7940189f87261f8d
font_01_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 11276 bytes
SHA-256: f7e6dfcd08a950525bfcf90d1bbad495b1075c15fa1269a936e33d29340c6e3b

Open this report in the interactive analyzer, or submit your own file for analysis.