Malicious PDF — malware analysis report

Static analysis result for SHA-256 b369706e77e51093…

MALICIOUS

PDF

253.5 KB Created: 2021-04-30 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb64f6c519cadd30d57683e695ad46e4 SHA-1: 23b55f0756c71c9cb2bf46ceacbf04cbf6f3c9a2 SHA-256: b369706e77e5109365e05e83f43c708347cc48e8a3643d736e71f053aeccbfc4
104 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading content, but is flagged as malicious by ClamAV and ML classifiers. The presence of a 'download button' heuristic further supports a phishing or malware delivery attempt. The sample's primary function is to redirect the user to a malicious URL, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/strik?utm_term=avatar+comics+the+promise+download PDF link annotation
    • http://vulufinagi.mypressonline.com/vufefatiwijilofawefumoli.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/jjifW1G/america_s_funniest_home_videos_may_17_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffd7c877e586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_600fcaa3393b0.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/ighbeje/91271901404.pdfIn PDF document text
    • http://gugudavi.22web.org/48137915415.pdfIn PDF document text
    • http://jotetimaral.22web.org/51652381473.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/fOppids/76953591592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_604d3b2df3636.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/I2gfIjj/nifefejezovafokepoguluj.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/iSWIGid/ares_virus_game_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5fe6c28452659.pdfIn PDF document text
    • http://megazoni.iblogger.org/acostarse_conjugation_yo_form.pdfIn PDF document text
    • http://nawireg.22web.org/war_and_peace_characters_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runodeb.rf.gd/cebuano_to_english_dictionary.pdfIn PDF document text
    • http://jidufapikefufeb.epizy.com/januxonivepojuwej.pdfIn PDF document text
    • http://vaxasevon.epizy.com/bevel_gear_design_procedure.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/best_free_reader_app_for_iphone.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/dream_of_snake_biting_face.pdfIn PDF document text
    • http://bitines.myartsonline.com/lejurozobikowonogude.pdfIn PDF document text
    • http://rojapaj.epizy.com/beats_solo_2_wired_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/rebepel.pdfIn PDF document text
    • http://sidakofonol.epizy.com/bofipawefanureduj.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/guardian_by_petsafe_wireless_fence_receiver_collar.pdfIn PDF document text
    • http://lewimidofi.epizy.com/7301929201.pdfIn PDF document text
    • http://dapibudajemuk.atwebpages.com/o_meio_ambiente_em_debate.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/sutobasizalet.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_off0003aca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ACA8 5452 bytes
SHA-256: 27a91b3d544d8bf62cbf307770ef4634d666873c47e250850a20a1c53c8079e7
font_01_sfnt_off0003bf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF1C 11096 bytes
SHA-256: e11d09cf88ef34219e9d4fb9619c68d0211594dade5edb85b22f6dec3b453066

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