Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4dab2b14dfcb5e9…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 21:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e6b5824542279fe949ee5eb2e809cacf SHA-1: a81720ceeee00022f601b264521b9ad6692641cb SHA-256: f4dab2b14dfcb5e9977f93bcbd5e9111dfe6ff6702d2ca4fdb3f242468eec4cd
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL suggesting a lure for downloading an audiobook. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as a phishing/malicious PDF. The ML classifier also strongly flagged this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/award?keyword=descargar+gratis+audio+libro+el+hombre+mas+rico+de+babilonia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392647/normal_6018f6c7ecc81.pdfIn PDF document text
    • http://mir23.xyz/40084070718ap0bi.pdfIn PDF document text
    • http://requiremcgood.com/hobbyking_servo_datasheeth1x84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_6011ae24ce034.pdfIn PDF document text
    • http://yourbigdick.space/tower_ballroom_wide_fit_shoes9ghp2.pdfIn PDF document text
    • http://teplotronic.ru/audit_procedures_for_accounts_receivablettwwe.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/2000_honda_accord_oil_light_flashing.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/mexijegedakol/maiden_dota_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/goku_vs_android_17_dbz.pdfIn PDF document text
    • http://wexalaz.epizy.com/vehicle_sales_agreement_template_word.pdfIn PDF document text
    • http://genenapukiral.epizy.com/confluence_version_report.pdfIn PDF document text
    • http://pasukebufi.rf.gd/nutone_central_vacuum_stopped_working.pdfIn PDF document text
    • http://fowasurutopalu.rf.gd/the_adventures_of_sherlock_holmes_season_1_episode_7.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/karevino.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5492 bytes
SHA-256: 3eb781e86c0476d971adb5d94f753569ad2ea20d452486a051bccb558a336699
font_01_sfnt_off0000fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 11832 bytes
SHA-256: 552c9c73fd83b87286ae33ec77a330a5476d068b5c629fd9c0abb8aa802ccd06

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