Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfa29331ed5276a…

MALICIOUS

PDF

77.7 KB Created: 2021-01-17 22:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 887f62e1dd80b9bbcf1ce87f4855f6d7 SHA-1: ce589ba82287e2aa1c136022cda129032d9bc3a6 SHA-256: fcfa29331ed5276a902f1de7dca418621f12ed824dc3a61b8379c02f8fe4e298
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a tactic to obscure malicious destinations. The embedded URLs, such as 'https://trafffe.ru/123?utm_term=vizio+m401i-a3+specs', are likely used to redirect users to phishing sites or download further malware.

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://trafffe.ru/123?utm_term=vizio+m401i-a3+specs PDF link annotation
    • https://site-1175287.mozfiles.com/files/1175287/4004908902.pdfIn PDF document text
    • https://site-1172915.mozfiles.com/files/1172915/visit_center_city_philadelphia_zip_code.pdfIn PDF document text
    • https://site-1219602.mozfiles.com/files/1219602/87712638957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_5fd37fb6cc89c.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/free_hershey_bar_wrapper_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/Cevtpha/50497671086.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/nglihIE/19477266374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_5fbe97ae2974d.pdfIn PDF document text
    • http://dixajadabaw.66ghz.com/consolidate_excel_data_from_multiple_sheets.pdfIn PDF document text
    • https://site-1179526.mozfiles.com/files/1179526/download_film_donnie_yen_kung_fu_jungle.pdfIn PDF document text
    • https://site-1176067.mozfiles.com/files/1176067/coloring_book_for_adults_free_app.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/razusip-sewufasek-doxitupubafoj-mapojulab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5fd3beec89b8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tonezifimoraga.epizy.com/transformers_5_barricade_mustang.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/96378880157.pdfIn PDF document text
    • http://lugirike.epizy.com/jafopugomamujatinu.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/23692103050.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/nidosezavemebadid.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/bloodshed_dev_c_5._11.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_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 5444 bytes
SHA-256: 15ea552232d0b3bcb1478b8a223bda4d16a6b1f21c1681b2727c914211bfaacd
font_01_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 12496 bytes
SHA-256: 986df1b05b902c4654d602d79b9b1450385e37bb9fb284760bb02e0cb1bbc56e

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