Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1e0610b8d9af3a…

MALICIOUS

PDF

86.4 KB Created: 2021-04-10 00:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5fd993fea9859d3e0d9a1e7e6bbbc174 SHA-1: 2416f39fd8bef296e3ac02a0b681ca96f47fc377 SHA-256: 6b1e0610b8d9af3a5cc7c13c120fbdc29b85415f1c3fe9c17e9675441fc05c5d
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'animation software', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=best+animation+software+for+free+download In PDF document text
    • https://cdn.sqhk.co/wexunaveb/kNeUohb/putesu.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/tijifasurorasa-zozif.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/iK5utuT/space_commander_war_and_trade_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/g7W6Cjh/america_s_funniest_home_videos_previous_host.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_60612107bbfe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_602656a65325d.pdfIn PDF document text
    • https://wedovaxebekusos.weebly.com/uploads/1/3/4/6/134634127/lusuvosepomozuj-jovok-siromazirum.pdfIn PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/00fe9a6e5.pdfIn PDF document text
    • https://tilinonulubun.weebly.com/uploads/1/3/4/6/134614078/xeduwelogukupu.pdfIn PDF document text
    • https://jesepivop.weebly.com/uploads/1/3/1/4/131483445/093fd21d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_602df39a19205.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/hiPjdjh/twisted_x_mocs_steel_toe.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/52cc2adb-e076-491b-8c7c-dcb89c9ee1f2/22217635910.pdfIn PDF document text
    • http://xugivikiseb.rf.gd/27894169427.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/75388632943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9da746f-57b3-43e0-bd54-dcfc81562c83/on_the_banks_of_plum_creek_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ed654d-0b57-4ba7-88eb-25f5217ac635/how_long_cook_frozen_roast_in_crock_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_to_live_24_hours_a_day.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/the_hobbit_3_full_movie_free_download_in_tamil.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/papetodipumelubalijo.pdfIn PDF document text
    • http://turakolop.rf.gd/gold_rush_season_9_episode_guide.pdfIn PDF document text
    • http://ruxujuzeto.rf.gd/12251678136.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_off00011520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 5196 bytes
SHA-256: f240a9f65fbdea0b3320ffde23ffab4c7dbafdace9a1da38e9ed550de16974c6
font_01_sfnt_off000126c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C7 10992 bytes
SHA-256: 22d939e1c454ae4ea3488bb85cbd0b5ea1dd6d427a080dbf63967bba51c72447