Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdbe2cea8c07870…

MALICIOUS

PDF

75.5 KB Created: 2021-02-28 03:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7fba34905037866f59d98dcaa4fb4080 SHA-1: 667fe08081afe04697ef641166f6ed2b9fc33083 SHA-256: 0bdbe2cea8c078703b35da1c830d045987d93ba8fc0bc3133dfdd5580df9d7c4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Monkey business gta v mission', likely a lure 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://leonvi.ru/strik?utm_term=monkey+business+gta+v+mission PDF link annotation
    • http://my-favshop.online/she_wants_me_dead_game_endingnvjku.pdfIn PDF document text
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/1483252.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/yoga_mudrasana_steps.pdfIn PDF document text
    • http://copyrighytsupport.com/6843424823w3gqm.pdfIn PDF document text
    • http://portkamesto.site/justification_report_exampleg0zof.pdfIn PDF document text
    • https://zevixaxilifudex.weebly.com/uploads/1/3/4/1/134131629/kaxirejewa.pdfIn PDF document text
    • https://nonedavoxezi.weebly.com/uploads/1/3/5/9/135956696/7670947.pdfIn PDF document text
    • https://pudavupotel.weebly.com/uploads/1/3/5/3/135335197/16cc26d4.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/tp-link_tl-wr841nd_v11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pemowepog.rf.gd/feropofusekikufavupitakut.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/does_adding_crystal_light_to_water.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/sulasiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/asos_mens_jeans_fit_guide.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_off0000ecf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 5248 bytes
SHA-256: b7899f06889f587a449578be315a522b49db4d1e7f2f7bf1d68e46b802ecd6cf
font_01_sfnt_off0000fee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE8 10168 bytes
SHA-256: 0b697734c2b1e6106d1d35558e6df5c541bfde5ab218fd5490c7605f427a1cee

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