Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01e4e03ad7701b1…

MALICIOUS

PDF

82.7 KB Created: 2021-07-09 12:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5e148ea39ebdc5b7ffb4406bffff77e1 SHA-1: 6613ffcb8154c03cf4e56cd6516fdec86ea8878d SHA-256: f01e4e03ad7701b17c65d3733754ba8b588dd97205eafc02105c111bbd0f3473
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. Heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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 http://irollee.com/userfiles/file/87150735678.pdf In PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/mavemofasetenamatavex.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vbchk6bamrtn3k9ciak8f5ghdm/50435016773.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/298a5729d6643437df12f24734ddc854/zorejawu.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/10108257050.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/96692035889.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608436e1cd140---gojomizejalamujofazinixe.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/firiraxunepakexun.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8f40339d0---fixawojulebe.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/178763fd11a00dae1971921f3269c27b/41263748454.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/22522457312.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bddc25bd5e---jagusi.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/18266667126.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160add1b71c770---pedutazeruxuragimobu.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/20537392712.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bff4010bb0716d11633266ddc2ea8fca/77785243834.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/94806307148.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/10497115948.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/c5c132ded772e8554cca899b8583be6b/vukijimu.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7ef3577f51520c1613d1c89cba3e8fe4/99380467830.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a59e31e6fe8---94062058410.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/14627078013.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/df8dbc7e9689e209248564be9c54cec4/nogasoxugoj.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/wirelovirarizoju.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e5d78126c3f83929c72bba4791afb52b/nadatumejelowabedisanunub.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/godukoteledugano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=rubbing+off+on+me+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD0 17148 bytes
SHA-256: 408ab525b37518e9be94172d9f95be1aa3265822b671d20d6b60643cdcca06c6
font_01_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001104b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104B 10428 bytes
SHA-256: 7509a2703db21c17d3746248082590424f0fd3540c811d8a51407af7503c3935
font_03_sfnt_off000127dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DC 16076 bytes
SHA-256: a671d37c7b3b889284622d243fc9727f378cc914a66da79eb58e164c6b93b0ed

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