Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2616b25f25624d…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 19:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 03d746a96dc88bcc6a36b73a8efcc2ca SHA-1: ae63e73bcbe565166735b8cbaf0f2b726fc40cf4 SHA-256: 6d2616b25f25624d81249791795e894584b848fbb16db7ae3a460da7aaf29dbd
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. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to a 'Lord of the rings film trilogy review' and application metadata, which likely serves as a lure to encourage users to click on the malicious links.

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://jottigo.ru/strik?utm_term=lord+of+the+rings+film+trilogy+review PDF link annotation
    • https://cdn.sqhk.co/semexixok/jdsfOp2/93120381444.pdfIn PDF document text
    • http://tendernes.ru/919908186486itjh.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/1gd7jhz/98134697271.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/geibQVO/puwitokawegaxisokumijox.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/jjivm05/cake_maker_pastry_simulator_cream_chocolate_cakes_oyna.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/cHhiiYB/eso_necromancer_tank_leveling.pdfIn PDF document text
    • http://vuzeliligovitu.iblogger.org/definition_of_development_planning.pdfIn PDF document text
    • https://cdn.sqhk.co/gimenuxot/bhjheEf/sefotegir.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/eM1pthg/samsung_notes_problems_after_update.pdfIn PDF document text
    • http://zawubitukete.22web.org/itunes_mi_nht_mien_phi.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/rL2Zyic/download_bubble_shooter_3_mod_apk.pdfIn PDF document text
    • http://creditstar-kabinet.com/xukodapojirfj6v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moduvodaw.epizy.com/topulurubokopopebanebib.pdfIn PDF document text
    • http://sajorasuxanuvil.epizy.com/blue_iris_camera_software_review.pdfIn PDF document text
    • http://pivutabomenatam.rf.gd/all_assamese_song_website.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_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 5304 bytes
SHA-256: 90e1f9a30a5cc46c74bc5701c1f458ffc83a2ba1adef5b14b64cc8499e14b952
font_01_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 10920 bytes
SHA-256: e660de168df535742129d1b3ab4ad00ce80a8bbaf6a408d55f1bccae5be86939

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