Malicious PDF — malware analysis report

Static analysis result for SHA-256 99647fed5e6f4056…

MALICIOUS

PDF

89.0 KB Created: 2021-04-24 02:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1b9801abcd20b229934d808c8766f982 SHA-1: de6710cdd0a496f7f8d57379fd12e10ee2f292a9 SHA-256: 99647fed5e6f4056782d5e1bb4c5ce66e479653e85bd8c3dbaec804f08eead58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

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://druttle.ru/strik?utm_term=pathfinder+adventure+path+hell%2527s+vengeance+player%2527s+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367624/normal_5fe314f69ec7e.pdfIn PDF document text
    • http://uscreditinquiry.info/harmonica_books_for_beginners_free_downloadszy84.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/uFje1jj/video_face_changer_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_606c15c04fb5e.pdfIn PDF document text
    • http://povar2020.site/nutrition_information_canadian_beerstefe.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/IjixggL/puppy_love_my_dream_pet_game.pdfIn PDF document text
    • http://formverifiedbadge.com/wafevajisurijenupimt4l5b.pdfIn PDF document text
    • https://cdn.sqhk.co/watexoba/ibTNhbb/getosuwarirupanuvub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381083/normal_5fc8384a7319b.pdfIn PDF document text
    • http://znakomstva69.space/best_jump_starter_with_compressor_ukyylq7.pdfIn PDF document text
    • http://italy-small.space/cherry_keyboard_switches_typesi8fip.pdfIn PDF document text
    • http://moscowflowers.shop/gatawumirorepipafiminuki0arjv.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/jahJs7B/bingo_music_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_0ff75e28bd934124bd129b7ecdc49e8d.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_9c779ab2e7414df4984ae88a72288a07.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fc6390-fc5c-4618-bf9d-a84d72f2259d/poxifemidenotababatesuj.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_f672b76807514e7587a06a49d27c2dc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d230ca2b-395e-459d-a161-ddb2f6886d41/72375530292.pdfIn PDF document text
    • https://da88601c-d7b1-4d42-bebc-9891560a8d86.filesusr.com/ugd/69695d_7e519cbcf2f544b8897d07012010c83d.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_off00011f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 5612 bytes
SHA-256: c2b4d463af6c6cf17010ea753b8f4a0b26fce6b5c34cb9e6d31ba3039f93a40b
font_01_sfnt_off0001323c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323C 10448 bytes
SHA-256: a48be283ee403c883698f78e603fc2f928ab062b5c1f4046bfc1e480c7b03cee

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