Malicious PDF — malware analysis report

Static analysis result for SHA-256 b711be5fdd9fc476…

MALICIOUS

PDF

79.0 KB Created: 2021-06-14 13:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f50e6ec320f4f78b454efdef5287bf8a SHA-1: c34ab5edcc28c04a561df2aa8d860c1513aacd25 SHA-256: b711be5fdd9fc476bb0c4ec009413816aa14764bd1ab4cbcab1dcad007ad1bac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document contains numerous embedded links, including a primary external URI to 'https://xezojetit.ru/123?utm_term=rs3+p2p+fishing+guide', suggesting an attempt to redirect users to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for link aggregation, reinforcing the phishing or malware distribution intent.

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://xezojetit.ru/123?utm_term=rs3+p2p+fishing+guide
    • https://cdn-cms.f-static.net/uploads/4451220/normal_605dc528288c4.pdf
    • https://tarazedi.weebly.com/uploads/1/3/4/6/134687061/tulelogovu.pdf
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ff0150c761c4.pdf
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/ridavaxat.pdf
    • https://kenitavujene.weebly.com/uploads/1/3/5/9/135977886/3575411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rixepal.pbworks.com/w/file/fetch/144505668/rodujadalug.pdf
    • http://junerew.pbworks.com/f/how_to_read_washburn_guitar_serial_numbers.pdf
    • http://jeselivid.pbworks.com/w/file/fetch/145124925/lekafujarosoxezaber.pdf
    • http://kemususi.pbworks.com/w/file/fetch/145093455/everstart_starter_50_instructions.pdf
    • http://sajateves.pbworks.com/w/file/fetch/144836325/the_american_promise_volume_2_6th_edition_free.pdf
    • http://pakesobiroge.pbworks.com/w/file/fetch/144532086/tamil_dubbed_telugu_movies_2020_download_tamilrockers.pdf
    • http://xujaripusa.pbworks.com/w/file/fetch/145202778/46463669561.pdf
    • http://fowobok.pbworks.com/f/vowovedurepelaxor.pdf
    • http://jifesepapo.pbworks.com/w/file/fetch/144445158/how_do_you_become_a_freemason_in_australia.pdf
    • http://xumamiz.pbworks.com/f/pokemon_mmo_3d_games_download_for_pc.pdf
    • http://razodegotit.pbworks.com/w/file/fetch/145170786/octane_4_crack_download.pdf
    • http://lifelekufa.pbworks.com/w/file/fetch/144561837/57128452698.pdf
    • http://lefilep.pbworks.com/f/all_jonesy_skins_in_fortnite.pdf
    • http://lagawiwefe.pbworks.com/w/file/fetch/144524523/73016230864.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_off0000f6e7.bin
80bd62ad591f49c8f03ad51cfd26387ac67f9b1d6f1a700cd8fe4a7f87162450
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 5268 bytes
font_01_sfnt_off000108e1.bin
5978463e6bcef0b839542e934f1106b910fe89d5f442425cb83c0911e319141f
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 11172 bytes