Malicious PDF — malware analysis report

Static analysis result for SHA-256 1260c94020abba92…

MALICIOUS

PDF

78.2 KB Created: 2021-04-13 02:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 90e3ee3895fabf784d3df3297babb0f0 SHA-1: 55bd6bcef1cb57d5ca820fd371014c497a2e79e2 SHA-256: 1260c94020abba927dcfac0de4f40e6552258b640115c09f82d32f800fab8f82
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it functions as a link farm, directing users to multiple external URLs, one of which impersonates a printer support page. The presence of embedded URLs and the link farm structure strongly suggest a phishing attempt to redirect users to malicious sites for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=brother+hl-5450dn+printer+offline PDF link annotation
    • http://tonukavugu.mygamesonline.org/bel_canto_technique.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/l_afrique_berceau_de_l_humanit_dissertation.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/ghhcie9/vugoziromenugevop.pdfIn PDF document text
    • http://nugawijuxuv.mywebcommunity.org/sotejox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_604a97f046a1e.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/75839522507.pdfIn PDF document text
    • https://vegirizixe.weebly.com/uploads/1/3/4/7/134716682/f3477541a724.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/rurisit_mogosukobox.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/cjebNib/run_with_map_my_run_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/hjjehih/43338825130.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/riwamaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/3ji2Aif/kulasumifezufozotu.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/kuses-wunajowisoj-sugikadita-koripig.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/xuxenoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5ff9fceed13a7.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/1756006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6015a24459dd8.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/JmY4Bjh/65859254923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_6029aa792c207.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/walomesedajiramabeniwewev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/6061_aluminum_sheet_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/vimifukepe.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/28768056964.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/gajojelezus.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_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 5176 bytes
SHA-256: 1d82923da2ec4d6717cd11bfa06ef3883aa52ddc9e3af587fbbefaa0dbcd31b8
font_01_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 11008 bytes
SHA-256: 1348ed84351ff0b418a19359c77465aa2788356103fd67cc145baa7df6f24e77

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