Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2197d43d7d4cb2…

MALICIOUS

PDF

74.6 KB Created: 2021-03-14 10:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f3632d779561dab2ab0dc2cd9fba7560 SHA-1: d452f93dc6fe194e62d95eb2b37ed03d6215f639 SHA-256: eb2197d43d7d4cb29dc36c42b42bcb02e9613db3d61e7f12c3ba68e0dedd13a3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this file as malicious, specifically as a phishing trojan. The embedded URLs suggest a potential distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://lozipotod.ru/wix?keyword=holes+study+guide+questions PDF link annotation
    • https://pasezoxe.weebly.com/uploads/1/3/5/3/135347718/844161.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/kjiO3TL/zegisipefoda.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/QAt8gjh/livufupobagezi.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/J9jhjba/42208230677.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/TreGeDJ/dominations_best_nation.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/hechbib/trustmark_mobile_banking.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/jbwicJZ/11204956092.pdfIn PDF document text
    • https://cdn.sqhk.co/zusegekum/jcilQZN/amazing_powerhero_new_york_gangster_download.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/movozexakox-xiterufumenu-kajuneg.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/bVCZgc7/world_breaker_hulk_versus_superman.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/fggghgg/yalla_ludo_ludo_domino.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/7055554.pdfIn PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/nasoxizalem-nijeziseluradu.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/kivukumozolinotufitu.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/G7hbxif/57979181365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9207e06d-9b7c-431a-a934-c88ca336bd22/18566693070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dee4e38-f75d-4e99-bbc1-40a23d42ea8c/wopoxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f72e460-a594-4be5-b60b-3a50adf4a04b/kalipedesudiwiwok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b4d55c-9d2f-45a7-a0a9-eb87abb6df88/93069444434.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/jotubisamop.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/daily_schedule_for_a_2_year_old_and_newborn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be45726e-1800-46e1-82d2-b6c420b8a246/guzezajomukivetawel.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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 4876 bytes
SHA-256: cb37bfb774e67320bc71f8a98bcb2bf8a4e0ab1e8ea6f7c77b8c94b1d81712b7
font_01_sfnt_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 11468 bytes
SHA-256: cede6f894ac1b2fb1ec1553246d043bae22810bb71289e418a6f1175f84a5fe8