Malicious PDF — malware analysis report

Static analysis result for SHA-256 3909649b0699554a…

MALICIOUS

PDF

84.0 KB Created: 2021-04-02 07:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed77ef591d80e7ed6f5aa2fc835cc71b SHA-1: d34afe814343258c516fb5a2edd17414caac93de SHA-256: 3909649b0699554af8efa29a6c77a11a018958bc3c859e5a10ff093b934e4926
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'jacksth.ru' which is likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=what+type+of+leadership+style+did+gandhi+have
    • http://idealicacolumbia.site/golf_buddy_voice_2_vs_bushnell_phantom8pbp8.pdf
    • http://jadebey-x.com/funobegodokatesugaxajax72yw4.pdf
    • https://cdn.sqhk.co/wodelaganav/wijoLge/65230998147.pdf
    • https://cdn.sqhk.co/doburazax/gMhdRXe/black_apple_wallpaper_hd.pdf
    • http://unityfree.xyz/329185676457lnyb.pdf
    • https://cdn.sqhk.co/vubiwete/cWzkhb9/american_athletic_conference_future_football_schedules.pdf
    • http://xbet1.fun/what_does_the_envisioning_meanclit4.pdf
    • https://xokekomoto.weebly.com/uploads/1/3/4/5/134598663/bejiwuruzitamo.pdf
    • https://cdn.sqhk.co/getabemuto/KsKheid/76735220190.pdf
    • https://vimikova.weebly.com/uploads/1/3/1/4/131437612/mekibegexevofez.pdf
    • https://lasirobazu.weebly.com/uploads/1/3/4/3/134399905/d9615d6f3bb0e5a.pdf
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/6195777.pdf
    • http://bitcoinlearningcentre.online/53262692911ohyd0.pdf
    • https://cdn.sqhk.co/remowiwa/CrqXjiK/fps_modern_strike_counter_terrorist_games.pdf
    • http://mainsale.pro/70155158110yecmg.pdf
    • http://classkaod.ru/pusidosmhy4w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d623fd2-76aa-4779-a1b8-492726bf78ae/savotojepewol.pdf
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_6d66fc36a062496a84af6f7ea7da6e06.pdf?index=true
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_033d6a047639474da2faa256b81b57e1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/295dbea4-1d22-4922-88c9-cf4ee4460bea/40490155217.pdf
    • https://uploads.strikinglycdn.com/files/0e83f311-30e3-46be-9266-d8a64568ceae/phrasal_verbs_dictionary_online_longman.pdf
    • https://uploads.strikinglycdn.com/files/91485917-9410-4585-8409-364f8b94e4c6/85493521380.pdf
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_7731113253c74daa9d65811c1ea9fc3d.pdf?index=true
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_de9e8d645fd4438393937b86191a40e8.pdf?index=true
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_c2ff0843f30547cd9818ea720f2295d9.pdf?index=true
    • 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_off000108ba.bin
b0e321c86f329a39da9d05bd77f3f0307b7aedf543206eb103baa49c6944e1b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 5476 bytes
font_01_sfnt_off00011b75.bin
b10621dfdc1a1568f3b21069339afb9f14f202dcfc1d517254e1577abc6503ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 10924 bytes

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