Malicious PDF — malware analysis report

Static analysis result for SHA-256 25be3cb4674b1b85…

MALICIOUS

PDF

81.5 KB Created: 2021-03-05 09:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: be23b7208b4c8c74995269d93000d912 SHA-1: 8af347ffc18970063c363ac0689398528c3dff9e SHA-256: 25be3cb4674b1b85a54b0b8e262b170da933df2ba105483f16370cd7760880c5
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'jacksth.ru' and a keyword suggesting a lure. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=mega+miner+2+player PDF link annotation
    • http://wejuzofibab.medianewsonline.com/monsterverse_godzilla_height.pdfIn PDF document text
    • https://cdn.sqhk.co/samojusive/jhicOL0/classic_rock_royalty_free_music.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/eKdtjbk/crossy_road_download.pdfIn PDF document text
    • http://sberin.xyz/76584834087zyrfj.pdfIn PDF document text
    • http://usesalle.xyz/zijexenagisoekroq.pdfIn PDF document text
    • http://timecodes.net/zombie_commando_shooting_mod_apk_android_1jde4l.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/uiiiaja/death_city_zombie_invasion_hack_mod_apk.pdfIn PDF document text
    • http://idealsit.space/haloalkanes_and_haloarenes_conversions_questions476hk.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/oakley_prescription_safety_glasses_australia.pdfIn PDF document text
    • http://gatorama.site/fubis968c4.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/1gig2Me/best_makeup_for_online_meetings.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/mfmhchg/hit_song_mp3_download_bestwap.pdfIn PDF document text
    • http://trikolor.site/how_do_you_program_a_remote_to_a_genie_garage_door_opener9sh5q.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/dd_5e_core_rulebook_set.pdfIn PDF document text
    • http://bullbananavannaone.xyz/xitapojulufudazuledrsws.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/vuvolomisonozewowusup.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/6294cd11-0fd3-41b9-aa6f-12e31cccb422/64513475506.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/actinomycetes_bacteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598a6448-d7e9-4393-ba7a-b92572f57c3d/65740440521.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/82378434056.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/zutofabisekowirit.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/code_enforcement_baltimore_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f231ace5-aa65-4ca3-8a0c-0a446c1ffb07/43091326262.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/40511658507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98dc78c6-65c6-47dc-aca9-30d608653e1e/61547421389.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_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 5200 bytes
SHA-256: f43c1b3bde8ab059ea6f6174f78ac584de5bd767a850b6cebb9e3f5e8db5e57f
font_01_sfnt_off000114db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 10420 bytes
SHA-256: d358a5cab9b7d3ceaf7cb7224c60f0eb5e25d72dec78d92889e31e400e60e4a0

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