Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c20e99bffb9322…

MALICIOUS

PDF

78.3 KB Created: 2021-03-04 12:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0f23f293bd1087dc376344c7cdba3aee SHA-1: 2e377d907ea7edad7d221c4e3d05a16f63edaafc SHA-256: c1c20e99bffb9322b28428fe6904199c06f4ca895896eee60ca80bd54ef98010
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to product pricing, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic indicate the primary goal is to redirect the user to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=how+much+are+tv+wall+mounts+at+walmart PDF link annotation
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/vadimazibemezos.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/yghhW2d/turbo_driving_racing_3d_car_game_download.pdfIn PDF document text
    • http://pet-guru.shop/11857549595xzbjd.pdfIn PDF document text
    • https://nenejiremox.weebly.com/uploads/1/3/0/9/130969141/pinavuxix.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/nafuxafadawevo.pdfIn PDF document text
    • https://sajurewuvow.weebly.com/uploads/1/3/4/0/134042423/zosonigositiwam_seroluj.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/jude_the_obscure_film_youtube.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/leica_r7_review.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/xabupan.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/kapogubumowunegujow.pdfIn PDF document text
    • http://wordsidepost.top/zujebibuzapamgbab.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/venunamazozuzo/what_is_a_rescue_diver.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/wobarofosixu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BE 5152 bytes
SHA-256: 08eecdfbee55974fd17d2f588f513a72af977da60e0089f9765ac1a336ff343b
font_01_sfnt_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 10348 bytes
SHA-256: 01efe7c3b1e0ef0d2b342974da64b2b764f46c1441542916eaed54925f47d5ec

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