Malicious PDF — malware analysis report

Static analysis result for SHA-256 9438e51e1eb91b36…

MALICIOUS

PDF

88.2 KB Created: 2021-04-26 18:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2e60bd01a8423c61244d4b08113b47b7 SHA-1: f20027c4a364f53d1112dea632cc091e19922062 SHA-256: 9438e51e1eb91b363cabe961cb05cd46f3869c2e5a360779c279c61b607accfc
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm on disposable hosting, indicating a likely attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=jumper+cables+harbor+freight PDF link annotation
    • http://lisolu.org/is_there_an_app_that_can_solve_math_word_problems3yovz.pdfIn PDF document text
    • http://getveran.site/does_panda_express_have_orange_chickenp5qg8.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/zetutevunageper_fuxoder_vozizomewipu.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/wujoxidosutotan.pdfIn PDF document text
    • http://goldalbum.ru/how_much_is_the_original_spider_man_comic_worthq909j.pdfIn PDF document text
    • http://vunelipu.iblogger.org/solororubiv.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/are_all_crayfish_edible.pdfIn PDF document text
    • http://price-list.moscow/mesa_boogie_dual_rectifier_footswitchgubew.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/gedezupal_lixetujonowiwov_nosalifirun.pdfIn PDF document text
    • http://sanadewa.iblogger.org/zajewawomefuxekujab.pdfIn PDF document text
    • http://testrun.ru/cyberfoot_2015_turkiye_ligi_indir_gezginlermzr86.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/pdf_to_autocad_drawing_conversion_online.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/8631923.pdfIn PDF document text
    • https://bupowuxa.weebly.com/uploads/1/3/5/3/135317106/4711108.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/13542300778.pdfIn PDF document text
    • http://otomail.business/hunger_game_movie_download_in_tamil9g6we.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilasatexovoxe.epizy.com/95007769407.pdfIn PDF document text
    • http://wareguw.atwebpages.com/94590600322.pdfIn PDF document text
    • http://depuxodime.epizy.com/naxafivululuzabamamirivu.pdfIn PDF document text
    • http://bajejefi.epizy.com/can_i_use_a_universal_remote_for_car_dvd_player.pdfIn PDF document text
    • http://fonivez.epizy.com/65092876709.pdfIn PDF document text
    • http://tavaleke.epizy.com/disney_princess_piano_sheet_music.pdfIn PDF document text
    • http://wajifinome.epizy.com/android_check_internet_connection_broadcast_receiver.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/microsoft_excel_advanced_formulas.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_off00011880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11880 5556 bytes
SHA-256: a15869bdd97701d56f552ded42aed384f0937461eaa2f42a82535731312a4f5b
font_01_sfnt_off00012b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 11576 bytes
SHA-256: 0188a2dd9662b2d0d4aa538eaa8cd95ccf1bf2c284bb8537914cce1dda95dc36

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