Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea284f6a710b7f4…

MALICIOUS

PDF

81.1 KB Created: 2021-03-13 15:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b665e47625e155e2e3f9690bf8d3ceeb SHA-1: 3891266a4ab0db825b84a99db6a13dfdd56993a6 SHA-256: 9ea284f6a710b7f45cd45278a7b9e39a42f52435a799c28c1ef0115fe52a9c8c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'nipisod.ru', suggesting a lure to a malicious website. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a phishing or malware distribution scheme.

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://nipisod.ru/wix?keyword=causality+3+walkthrough+unblocked PDF link annotation
    • https://cdn.sqhk.co/fakodozug/izAnhfb/berotoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_6022605aea1f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_60283ddc24f2a.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/telemetry_systems_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/jj4Cjis/40391646458.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/jb9rEID/feud_french_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/iBhawTi/29361795628.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/2jiTpLg/vizularazadejin.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/idLmD5a/dominunisajuvupegifofotam.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/9jfggji/kazoxisodu.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/iiagfDi/snake_in_spanish_voice.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/jhhAn8Y/77486607336.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/bfhaQgh/ruvuzivupakuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/hfjbgeZ/pc_games_more_wow_classic_sonderheft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ff3708d6ad93.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/nibjamc/dagawonijexuvakekikese.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/eokaheh/lenixekomibojumugit.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/merkury_bluetooth_headset.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417033/normal_60001ab39d341.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/bi2Shcd/pexufevadajofugexoxusiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rijemow.onlinewebshop.net/raymarine_c80_firmware_update.pdfIn PDF document text
    • http://jidowadosul.epizy.com/bench_press_form_dumbbell.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/jajajaroravixuketetaxanad.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/kebufelakivirixifurijuxa.pdfIn PDF document text
    • http://vesuduw.epizy.com/xifulowidimofovukagiko.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_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 5668 bytes
SHA-256: 49c023a922a962f2d7a7adc11bfe04fea4232c3110c94097189a6e0202f51991
font_01_sfnt_off00010cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD1 12596 bytes
SHA-256: f4c2fb3f4ee3b8834b8953ffb810c914738808ffd2b1c3421f78fa4444db0d1f

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