Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a858daf9f1571b0…

MALICIOUS

PDF

74.2 KB Created: 2021-03-23 23:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb0b99a99408d338196cd690f43fcb4c SHA-1: d57282d4781216818ff8cfab4cb174a447aaefd8 SHA-256: 6a858daf9f1571b09b1f2be0a09a095b860fb7673dd986bc1902865fcccc37cc
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF SEO link farm. The primary URL, https://druttle.ru/wix?keyword=funny+birthday+wishes+for+a+deer+hunter, suggests a lure to attract users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=funny+birthday+wishes+for+a+deer+hunter
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5fd280b83f080.pdf
    • http://tuzupibu.scienceontheweb.net/94451440619.pdf
    • https://cdn-cms.f-static.net/uploads/4488103/normal_6049e684cd576.pdf
    • https://meliwuka.weebly.com/uploads/1/3/2/7/132740471/541544.pdf
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/giredofapidoge.pdf
    • http://luxasireku.sportsontheweb.net/4440534791.pdf
    • http://nomenowunesazoz.scienceontheweb.net/what_is_the_difference_between_ts_16949_and_iatf_16949.pdf
    • https://cdn-cms.f-static.net/uploads/4387586/normal_6013e1c58fc66.pdf
    • https://cdn-cms.f-static.net/uploads/4485942/normal_604d5b7cc9184.pdf
    • http://potawuzaj.medianewsonline.com/dungeon_masters_guide_fifth_edition.pdf
    • https://cdn-cms.f-static.net/uploads/4383800/normal_602f2d749ae49.pdf
    • http://fejekadiwoxobiz.getenjoyment.net/cantaloupe_island_drums.pdf
    • http://nirenodeba.medianewsonline.com/basic_english_grammar_book_in_tamil.pdf
    • https://cdn-cms.f-static.net/uploads/4476146/normal_60486f75dfa95.pdf
    • https://cdn-cms.f-static.net/uploads/4378830/normal_603d9e1e48f46.pdf
    • https://zasosefudasu.weebly.com/uploads/1/3/1/8/131856937/321dcb.pdf
    • https://cdn-cms.f-static.net/uploads/4486351/normal_6014f58e5f337.pdf
    • http://lebuvowune.getenjoyment.net/whats_the_fastest_way_to_learn_korean.pdf
    • http://xijipeva.mypressonline.com/soretupuxutegitot.pdf
    • https://cdn-cms.f-static.net/uploads/4481422/normal_604d452fb986f.pdf
    • http://godezigupo.mywebcommunity.org/antakshari_songs_list_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duziroro.myartsonline.com/what_is_tales_from_the_loop_about_reddit.pdf
    • http://peledopa.myartsonline.com/elkay_drinking_fountain_with_bottle_filler_troubleshooting.pdf
    • http://zowofiz.myartsonline.com/pdf_accessibility_checker_pac_3.pdf
    • http://sefowolo.atwebpages.com/stairway_to_heaven_sleeve_tattoo_designs.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65e.bin
5071a4cd75648b9d3e62df7c73987d261737d9fc86614b7834db1d9a2c1cd5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 5252 bytes
font_01_sfnt_off0000f848.bin
a6d65df6a4e1e0e38ba943ffd698452f6535d3c49d5d28500419ad792541335c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 10300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.