Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c34ff5ff3a5400…

MALICIOUS

PDF

86.5 KB Created: 2021-07-23 09:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 30f4786eda82c3c7877f23640ae854f7 SHA-1: 6e248dfe658a174b636fdd03febf41fae1a44ce8 SHA-256: c9c34ff5ff3a54009dad688c383318d96e01502310dd63288c95ad8b2df9b7d7
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ob5m11qqbdad45kneqjgi9pp2f/vovajoxumevogalamotik.pdf In PDF document text
    • https://mimpishio1bet.com/contents//files/59390507482.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/16235ece1b4097fbe4e215ec5c9338bd/25408730874.pdfIn PDF document text
    • http://jhroseclassof77.com/clients/45984/File/gofaxofezanuturanijagep.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fufuwawosixuz.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefce2f973---zonaxufumuvosebaper.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/reqhpqfkqmd1ttmisq1gg6h60d/68543343703.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e9190b229706d7eb6c4f7904b27eb541/kepanapo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce61add4d9f---wotuloburemedugilolage.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bkik8s78u506ddme9bdvepk6m0/71955708482.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/2046256982.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2aad48ebaee400c8ff39605f931a109b/sekemefowezidoko.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/sipananofarakufemi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/trncg73k9f7b6h0uve5uppk2ea/53420267001.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e9817fc09e40ba3ed1665b25413b2ab1/jaredevajogiponikepotifa.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/wotaxodibuwimelaxul.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/72c619416f2a02d6026d939819887c3f/35882112269.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608681aa972c1---duzeto.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cd95603f697---lijanup.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/parakonotuzalesadoneniwus.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/xowulezal.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/tobifotofizefupikojimifus.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4e7b39693---4498400648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=by+descent+meaningPDF 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://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_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 16852 bytes
SHA-256: 1b843a9434d6aef14e9a3322a255fd4c6bfa6779a43e4f4ff45fe2cba8773c3a
font_01_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001337f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 10616 bytes
SHA-256: b71bbecced93a034b6030943de37b76ad3b2ecdb630acc5751a643d2bb618478

Open this report in the interactive analyzer, or submit your own file for analysis.