Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e928c90126925…

MALICIOUS

PDF

88.2 KB Created: 2021-09-13 14:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 41f525cfaaff1578d6f35cf5ec59d4ec SHA-1: a15624cfe0cac25daf605a2f97769258c1feb26f SHA-256: 0b0e928c901269252ddefec76c0578bdfcff937e3181a14a0d14f52ece0219b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://wastran.ru/uplcv?utm_term=aplicaciones+para+descargar+musica+android PDF link annotation
    • http://topaslt.com/userfiles/file/sajibiguseki.pdfIn PDF document text
    • http://beiwendq.com/data/attachment/file/99412960729.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/rededojilubuva.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/38586355463.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2f86be88c---41989136568.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/fokuzow.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210913072840.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/67088209799.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/55925369601.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/wuvulilomenubakigodete.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/vafuxosagenuke.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/lofagomemukomolabopus.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/vopiju.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/kevasawasurafobugesijit.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/semimaroxodewu.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/22593364300.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/72268374661.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372c596ff59---pinafuranitaxaxegusala.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/61704935568.pdfIn PDF document text
    • http://accronline.com/userfiles/file/dotowuzefenesaxepa.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/50053730455.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/47612106418.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/54632068387.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/sikusuxupolilikaponok.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/68651723876.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/19695782399.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://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_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 10840 bytes
SHA-256: 9067140d89b96f0f18cabe65452627ed011186b32f6fb83ec58affaa62a1bd30
font_01_sfnt_off00010b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 18860 bytes
SHA-256: 5cb62f36b1a0d171189db3bbd41706f0b3f5f2156288237fec9309ecd34c6e2d
font_02_sfnt_off00013a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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