Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec47c861e81cbfb3…

MALICIOUS

PDF

103.6 KB Created: 2021-04-04 05:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: db37b59f60cdee8a416b699b0d4ff3bd SHA-1: bee7c6dda3499f716f5a6e3b894cb030add85b21 SHA-256: ec47c861e81cbfb397cca0ff2674193c4599fb831a2e3e6571802e250f6d3895
226 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains references to 'Foxtel tv guide nfl' and 'wkhtmltopdf', indicating a lure to attract clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/123?utm_term=foxtel+tv+guide+nfl PDF link annotation
    • https://cdn.sqhk.co/numokafas/hjcjiDd/sumaji.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/have_been_and_have_gone_exercises.pdfIn PDF document text
    • https://vuzazaba.weebly.com/uploads/1/3/0/8/130813658/6534218.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/59856383208.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/ritexufi.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/3910002.pdfIn PDF document text
    • https://zagumugapepari.weebly.com/uploads/1/3/1/6/131636872/895762.pdfIn PDF document text
    • http://damewonuseba.sportsontheweb.net/aarushi_talwar_supreme_court_judgement.pdfIn PDF document text
    • https://rijejoxutozi.weebly.com/uploads/1/3/4/5/134599637/5257000.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/kevototed.pdfIn PDF document text
    • https://mokaleje.weebly.com/uploads/1/3/4/7/134732408/mexusidi.pdfIn PDF document text
    • https://kutenenoki.weebly.com/uploads/1/3/4/7/134704657/wezemixobinovup.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/hbjgijg/xevenalinomurovegil.pdfIn PDF document text
    • https://netiwililisal.weebly.com/uploads/1/3/5/3/135398280/viralepanero.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/pabam_nojidevabesaja_bizatulelinev_gaxunuxedafudi.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/iiosDhb/anatomy_skull_profile.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/kivibejalifujijuvove.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/6930299.pdfIn PDF document text
    • https://bemezonef.weebly.com/uploads/1/3/5/3/135389856/ae2c745408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/72342275511.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/call_of_duty_cold_war_patch_notes_1.06.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/womutugusisegu.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/amino_acid_types_and_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/anabolic_steroids_davis.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_off0001572d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1572D 4676 bytes
SHA-256: 8f2fcdd9af73ba8d78ecaf9b9ce8a596522352f23f90a09c19c049cf6ed41e45
font_01_sfnt_off00016741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16741 12056 bytes
SHA-256: 80033d6d69845e3ce2755585c8b587934dd5ae9c1b79170e85f99507542788d4