Malicious PDF — malware analysis report

Static analysis result for SHA-256 884889e2c1e9eacf…

MALICIOUS

PDF

80.7 KB Created: 2021-04-13 17:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0c935c45940feb76b4128da26cc4e15 SHA-1: 7b3e07642e026daee6450d033afbd2ae8ea63e5b SHA-256: 884889e2c1e9eacf066de51ab9edfadd615959a1f521f3b45eac9c81312ccae2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs and the heuristic firings related to link farms point towards a campaign designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://vilenefex.ru/strik?utm_term=m-audio+xponent+driver+download+mac PDF link annotation
    • http://zoosalon.org/85096933052gvgm9.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/xomod-jobemogoz-zokemuveledo.pdfIn PDF document text
    • http://m-laskin.ru/what_can_you_make_on_a_george_foreman_grillgarem.pdfIn PDF document text
    • http://pokypka.xyz/cosecant_secant_cotangent_worksheetypsd7.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/mapodutedowu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/ibjheib/space_turbo_2020_space_racing_game.pdfIn PDF document text
    • http://taygerr.com/quadratic_sequence_formulaixsjf.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/kujewulefodifu.pdfIn PDF document text
    • https://cdn.sqhk.co/negixakozaxu/wjehPdp/new_ups_warehouse_goodyear_az.pdfIn PDF document text
    • http://policyhelpcenter.com/32730563093x60vu.pdfIn PDF document text
    • http://belldiscount.ru/numerologia_cabalistica_emcf0ui.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/G1Kidjg/critical_frontline_strike_offline_shooting_games_mod.pdfIn PDF document text
    • http://prostotit.site/serato_dj_pro_crack_mac955eb.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/Ggh6ia2/73133682016.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/suterurevodezamoke4g3.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/TIHgchd/versus_the_elite_trials_romance_options.pdfIn PDF document text
    • https://cdn.sqhk.co/wojidumezu/hhfJGzt/learn_python_programiz_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/P4gjjhh/hillside_drive_game_tips.pdfIn PDF document text
    • http://beliyden.xyz/samsung_q6f_special_edition_reviewp6qoy.pdfIn PDF document text
    • https://lelidejob.weebly.com/uploads/1/3/4/6/134643066/zabuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/dtljjgh/durejoditesi.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/fUgYSPd/out_there_chronicles_episode_2_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 5296 bytes
SHA-256: b0871ad8d24dd9b26d75c8a46db24f5aea6350ae0cf03e84aef203445072c83d
font_01_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 10764 bytes
SHA-256: 0d3102bc27c6dfbb90fd5e9a6baf4aa9f1c29d993788809b1659204912908bd4