Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6badae4561c7e5d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-11 21:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8e35ea1f196cd9bfa117e413aebdb946 SHA-1: 17b154db4a2bec9c6e4be85626f14af1f5bcf915 SHA-256: c6badae4561c7e5ddedf402f5ea9e72b10fc55f6ee442b1c55ce2156ed40f1d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to potentially disposable hosting, suggesting a lure for phishing or malware distribution. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://seowonbattery.com/files/fckeditor/file/17986378456131664e7658b.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346aa5e5109---23207055383.pdfIn PDF document text
    • https://ocw.tw/uploads/files/pudugepawanofikebesagipo.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/dewem.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/93412582918.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/balefisupamuzifivitososop.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/15531058311.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/47728260100.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/momubidagevepaz.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/sorobixebig.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/sibenaraxarusokijekibu.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/28821322668.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/24272288483.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/39664311279.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/barofujemusoxibitan.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/mesurelin.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/towosapemanavap.pdfIn PDF document text
    • http://ergakiland.ru/files/files/joxexuriwezigavoton.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/nileza.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/63695882716.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/58653784214.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/72336749121.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/46924072532.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/59759490221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=uk+drag+race+watch+onlinePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 17944 bytes
SHA-256: fbb9c49096f7c16428e73980db286fec974991c13cffe1c9eeb88f766066a683
font_02_sfnt_off00012c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9E 10664 bytes
SHA-256: a3932b8588905062ac2bc898430478ff264649d3735692683fa269819667109e

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