Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff14cc489bccf7e0…

MALICIOUS

PDF

75.7 KB Created: 2021-01-23 12:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae7424cac36581a5469b7473d46d8dc2 SHA-1: b77bd71462284193a08f17411cd99e13ec3ea9b8 SHA-256: ff14cc489bccf7e02cf46826a22edc11b9c48d1a302288c6e3b0cf7233f3984e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'carb cycling made easy', indicating a potential phishing or scam attempt. The presence of external URIs and link farm heuristics points towards an effort to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/aws?utm_term=how+to+guide+carb+cycling+made+easy PDF link annotation
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/1529492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fe872d8bbc71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5ff699b1461c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_5ffb1505ecc5a.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/58190434409.pdfIn PDF document text
    • http://tujodugugejime.22web.org/dogesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fd84432934ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://togewogovimome.epizy.com/arma_3_exile_mission.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/iphone_and_android_meme.pdfIn PDF document text
    • http://zisuvedo.rf.gd/51681134004.pdfIn PDF document text
    • http://dozonexupiwef.epizy.com/android_cricket_games_phoneky.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/godesezivasepofolovitugo.pdfIn PDF document text
    • http://nolepukopele.epizy.com/bimevotojunizesozam.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/ninurituvonipavuwux.pdfIn PDF document text
    • http://pitefabe.epizy.com/47565015687.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_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 5552 bytes
SHA-256: 915142a191e204efa12826c34879ad724232f5673d61073fe7886bd121e34a1e
font_01_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 10828 bytes
SHA-256: 48c4f2754c2d6b510f67a2c45c1c487a6f916227157080c2e40ea74999b2d472

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