Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d2a11f2e3136ab…

MALICIOUS

PDF

82.9 KB Created: 2021-03-17 03:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecc125025371d6fe40b4ddaa6654036c SHA-1: 9b7fda1dc397d72a6a8eae02cb0161b1a19595ec SHA-256: 11d2a11f2e3136ab2bcbc7b75ee5e7205db5dfa4a64abc58d2f2a9a6643c0254
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=does+fruit+of+the+poisonous+tree+apply+to+civil+cases PDF link annotation
    • http://mazafaka69pussy.online/moto_traffic_race_2_multiplayer_mod_apk_downloadh1ran.pdfIn PDF document text
    • http://itawegan.space/77644164207mjt3.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/RCKCjfK/go_karts_international_drive_orlando_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/Ngjjdhj/cranberry_juice_viral_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/j8gjggr/fakifipasugatomudexopok.pdfIn PDF document text
    • https://cdn.sqhk.co/tizadufof/if9iNxG/48568203975.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/jBRjdja/wrestling_revolution_3d_apk.pdfIn PDF document text
    • http://floradoma.net/peveluzogozebuvoritem07bai.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/xieHjfJ/what_baby_animal_are_you_quiz_playbuzz.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/c8ghehi/my_autograph_kannada_film_song.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/idjdKea/55235168671.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/Uhdhj5t/nudirenavivomegaza.pdfIn PDF document text
    • http://stavki-na-sport.site/ponulapbrxp.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/aMhdjjY/13401880115.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/hjbggyD/vice_president_news_jobs_toronto.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/JibghCL/dimavulebosinidumujoreke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb01696-6349-4888-bfba-e1cccc8c0c05/crown_xls_1000_amplifier_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04f1933-00bd-48e4-a93e-cf8d310e9eb4/make_it_stick_the_science_of_successful_learning_review.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_8aa91a4841394c42b55ae9160b48b14f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc44ddc9-ec2b-4677-b9c5-f99c4e025386/52550168029.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_9f26ef75ba1a4233b7d26347ed07b5fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d4de50-85b8-4c8b-9699-2c075fab47de/90822043250.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_dd2630deff004ca2a5cbee7e87ba839d.pdf?index=trueIn 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_off00010743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 5264 bytes
SHA-256: 025d17d9952bf2ae79565c4e455ddaca0cc7688a1263a8ca19630339f66e8e9b
font_01_sfnt_off00011939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11939 10704 bytes
SHA-256: 41c253f28db8b60fe926d9fb77eff5c3752a7a0bfb2295e0e854561ed6878adf