Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c481dd463549c86…

MALICIOUS

PDF

94.5 KB Created: 2021-03-14 06:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 84e47b1cb5768e70766e4773cf195c0d SHA-1: 5e5c9efe493a06ac9b1ba8ff205163f7b38f8758 SHA-256: 7c481dd463549c863135e50740b169ee18d454cda3ca534af7685a27c2f27c0e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It employs social engineering by impersonating PayPal to lure users into clicking a link, likely for credential theft. The embedded URL 'https://vilenefex.ru/strik?utm_term=stealth+cam+card+reader+app+not+working' and the action link 'https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/zelizizemin-gaxopigevemazu-puzojig-voligox.pdf' are indicative of a phishing campaign.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/zelizizemin-gaxopigevemazu-puzojig-voligox.pdf.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=stealth+cam+card+reader+app+not+working PDF link annotation
    • http://bagomebefekixob.getenjoyment.net/jekiwakidamoxoxawemew.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/is_savage_arms_still_in_business.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/zelizizemin-gaxopigevemazu-puzojig-voligox.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/allen_carr_easy_way_stop_smoking39eol.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/nasb_macarthur_study_bible_2nd_edition_premium_goatskin_leather.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/ganuburapo-vudek.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/zeganudabaw.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/6807379427.pdfIn PDF document text
    • http://j3vnci4.xyz/normal_delivery_baby_video_freekf6pk.pdfIn PDF document text
    • http://misirabul.22web.org/goodnight_moon_lyrics_book.pdfIn PDF document text
    • http://sovetnik53.ru/powerdirector_15_tutorial2m8ep.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/xugibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://diveruwafulebes.epizy.com/wings_of_fire_book_4_graphic_novel_pages.pdfIn PDF document text
    • http://memajale.epizy.com/simba_a_full_movie.pdfIn PDF document text
    • http://fokezazonof.epizy.com/41901627053.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/acid_base_and_electrolyte_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/mawewivefobikedavupewulat.pdfIn PDF document text
    • http://pewafinapotoja.rf.gd/how_to_say_a_case_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/pdf_to_word.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/10932316305.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/nasosuzupozuvula.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AA 5356 bytes
SHA-256: 1ee03a2cb447aee0ec0de2039b09e277f9575b9bf2976c10cb1a9c898abd006d
font_01_sfnt_off000138be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BE 11032 bytes
SHA-256: fd3145dcb94ab95e726e377fb22988e436b7ef2bdc5760307f813499f0453b32
font_02_sfnt_off00015e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3