Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa72e6874532036…

MALICIOUS

PDF

69.2 KB Created: 2021-05-06 02:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f3367ef179c5efc0b9a5a092f8ed88ce SHA-1: e1775f156ff204251933c7fb2176a62d1c9011a9 SHA-256: faa72e6874532036956fe9d19b1e70a83e48f9991b4e46b55ae16ef6e164d9f3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Dungeons and Dragons' to entice users to click on the malicious links.

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://vilenefex.ru/strik?utm_term=dungeons+and+dragons+player%2527s+handbook+online+free PDF link annotation
    • http://wovewor.iblogger.org/jinironagifararezojo.pdfIn PDF document text
    • http://hellesypakk.online/530286844506brhp.pdfIn PDF document text
    • https://jifigisij.weebly.com/uploads/1/3/2/8/132814194/zuxiwoz.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/3581266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_6039f533ef833.pdfIn PDF document text
    • http://xitnet.fun/jinikunafogaqd2p6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ffe0b25e22d8.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/webusadefis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fd99eba29522.pdfIn PDF document text
    • http://vizionsmc.net/tilazajobofelutadizewuyscmb.pdfIn PDF document text
    • http://idealslimitaly-official.site/sitatozitefatugejolavakuv43dd.pdfIn PDF document text
    • http://itawomen.fun/63228970682f3kdg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482216/normal_6029fcc3843ad.pdfIn PDF document text
    • http://registrat.space/39956466890ok3ox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_605db1560b8ed.pdfIn PDF document text
    • https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/71a51ab1df423ed.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/college_comparison_spreadsheetkxom5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubeleboju.epizy.com/football_games_uptodown.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_off0000cbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA 5640 bytes
SHA-256: 1d37bfa1189f08995f94485afaa368ffe6e732604eec77c8ab8519ed73018e4f
font_01_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 11340 bytes
SHA-256: dd647d763816a9327197e23d3e26e7315741ed0919cd3414a0c199f988e5bf1e

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