Malicious PDF — malware analysis report

Static analysis result for SHA-256 061d9a261907fa14…

MALICIOUS

PDF

76.0 KB Created: 2021-04-29 23:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c791e3c08b0959a969d01fd98f844992 SHA-1: 40d71a890b72253b1f48902d45237d1b6c6161f1 SHA-256: 061d9a261907fa14bedb79285a6c274cf304d98d8809ffadaa6506048dc2234e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'dafemum.ru'. This URL, combined with the heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a search result snippet, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=does+the+2018+camry+xse+have+remote+start
    • https://cdn.sqhk.co/nerawotobiz/jjejdkI/english_bass_songs_2018.pdf
    • https://cdn.sqhk.co/vixemujomu/c38igIS/flud_ad_free_apk_mirror.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7e6905e9-e753-49b4-8972-f50711a6168f/how_many_pages_are_in_a_series_of_unfortunate_events_book_13.pdf
    • https://s3.amazonaws.com/fovezewi/15488824965.pdf
    • https://s3.amazonaws.com/tawovojo/3-2_reteach_angles_formed_by_parallel_lines_and_transversals_answers.pdf
    • https://uploads.strikinglycdn.com/files/87e666fc-0ac9-448f-ace0-db57aeddae39/sun_joe_spx3000_parts.pdf
    • https://s3.amazonaws.com/dumupa/messenger_lite_id_uptodown_com_android.pdf
    • http://pudolajuji.atwebpages.com/teluluxi.pdf
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_b654a2500b3e439fb2fabd33dbcbbdc5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35eef037-b6e2-4e58-a32e-05cbcebef223/pufuvonenokexonifa.pdf
    • http://tonavisuma.onlinewebshop.net/15850450616.pdf
    • https://s3.amazonaws.com/jeduzizonox/phonics_test_first_grade.pdf
    • https://s3.amazonaws.com/dojonuta/tibanojafe.pdf
    • https://65f7c47b-6fa2-4aed-9649-637438a88329.filesusr.com/ugd/8fb471_4ea87755bd7e4f4d8e54a8d22b5c3a2e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/726a4da3-0ac7-464f-8782-e17a778d9dea/45111208070.pdf
    • https://s3.amazonaws.com/jixeremipet/tuvilixuvarufopifud.pdf
    • https://s3.amazonaws.com/vabedafozo/eunectes_notaeus_caresheet.pdf
    • https://s3.amazonaws.com/lixuduwonifa/what_are_the_three_types_of_relief_sculpture.pdf
    • https://s3.amazonaws.com/lopadivupudexa/counting_stars_violin_sheet_music_free.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_off0000e71d.bin
da76b867abcffaf35c5cd9af8bed450d78dbf246ef32ba6e6d9dfa23c9a2205f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 5756 bytes
font_01_sfnt_off0000fa9e.bin
892aff93c483798950aa46bdf1a87bacd268af563637871309571de97f7c5f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 11680 bytes

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