Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93323fcb724aa76…

MALICIOUS

PDF

70.6 KB Created: 2021-02-20 18:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 512c996e40bbb4773ff9c9d83418bb87 SHA-1: bd51a6b7a7a645aff6fa37766f6d36e3f4649292 SHA-256: d93323fcb724aa76fc9093346e0d3e17bc847d7c02806bdf75e0bbb49550fbb6
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to video games. The heuristic firings strongly indicate malicious redirection and phishing attempts, classifying it as a phishing trojan.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+play+stick+fight+on+ps4 In PDF document text
    • http://choosemadam.site/instagram_stories_online_iphonedh1x8.pdfIn PDF document text
    • http://sunny-web.ru/labo_cell_innov_formule_articulation05zth.pdfIn PDF document text
    • http://musc-media.xyz/52303087082nne5.pdfIn PDF document text
    • http://smartcoin.design/soul_knight_codes_2019_iosq5ql4.pdfIn PDF document text
    • http://stavki.link/favuxalekumumuzitevabini0fqdh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_601e02f2c8b6f.pdfIn PDF document text
    • http://zhigina.ru/anjali_anjali_pushpanjali_song_masstamilan8yif6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370985/normal_5ff8b586d6d64.pdfIn PDF document text
    • http://thepropheticapp.com/178439984238hqyc.pdfIn PDF document text
    • http://lenudes.com/89480285958oj0z8.pdfIn PDF document text
    • http://myfoxing.online/deadpool_2_rating_parents_guidembooi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavijiguzedimeg.epizy.com/hugo_boss_orange_jacket_size_guide.pdfIn PDF document text
    • http://dofatolepe.epizy.com/mipuwefigelamepupozinup.pdfIn PDF document text
    • http://vekifaxofezawe.epizy.com/girosuwebodugenesoxapi.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/redakonidageravafikar.pdfIn PDF document text
    • http://kokegewabero.rf.gd/domefofofaniponedalu.pdfIn PDF document text
    • http://xofiketur.rf.gd/52681741296.pdfIn PDF document text
    • http://nimunofat.epizy.com/bhojpuri_comedy_movie_full_hd.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 5488 bytes
SHA-256: ecbef8647fb5425021540ff066c36647ddeb76eceb16c09e55cea1c681d8dc4b
font_01_sfnt_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 10680 bytes
SHA-256: b399c02337279ecb34e22053b81f9f79797f9ab07a992a37d751de4f5d39b34a

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