Malicious PDF — malware analysis report

Static analysis result for SHA-256 3207597d51dc89bd…

MALICIOUS

PDF

71.3 KB Created: 2021-03-17 01:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 918ace440a4b4905921c29a5abdccd65 SHA-1: f77657ed352b0ad8c53798344462ef3ef2ae54ac SHA-256: 3207597d51dc89bde537d1e92437432f1d1a2daa890b74d8c8fe0f8ca6e555f9
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a product manual, designed to trick users into visiting these malicious sites.

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
  • 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://bologen.ru/wix?keyword=sony+xplod+52wx4+manual PDF link annotation
    • http://vuvajujuli.mygamesonline.org/gizurekemekamexiwadewu.pdfIn PDF document text
    • http://romeita.space/change_default_music_player_applexvjuh.pdfIn PDF document text
    • http://opt05.ru/lagitifapemetalosuluukx01.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/tjbWjcH/bujixidinub.pdfIn PDF document text
    • http://soluzixod.66ghz.com/chucky_horror_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jfnWjhA/5569546501.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/khenqib/hku_undergraduate_admission_deadline.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/60480410549.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/bZjajg4/zero_gravity_skydive_drop_zone.pdfIn PDF document text
    • https://dubasebajulux.weebly.com/uploads/1/3/1/3/131382081/pefetevekuv-sanitexikozobeb-tamumobima-baruru.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/4127478.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/pelunokodexaweves.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/gThibDu/fedumadajojobaduj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedokimisizat.rf.gd/magitogokoxofax.pdfIn PDF document text
    • http://zolewari.rf.gd/1701453927.pdfIn PDF document text
    • http://wurifikag.rf.gd/kodegituburota.pdfIn PDF document text
    • http://kojokiguxan.epizy.com/42425323692.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/dodevurorutuzelarakuz.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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 5540 bytes
SHA-256: 10f603d616cdcb68bedc91d922fc2d516e052aa2dc9c66a3881f65315e852558
font_01_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 11444 bytes
SHA-256: 977e6e58410601fe8d7a561114dce06ad262a20f4ec596d8e259294fd63e29cd

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