Malicious PDF — malware analysis report

Static analysis result for SHA-256 176afdd04071dbf8…

MALICIOUS

PDF

79.5 KB Created: 2021-08-28 18:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df14b2f94757664d7197c20b67a50c48 SHA-1: 9a359513464a34d63d869556d56d03bcc547bebf SHA-256: 176afdd04071dbf8a76be693f10752230983af930748c32e961862afd4abd6e3
156 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://jxloanchien.com/style/postimage/file/figamegonarobokakezopem.pdf
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/fezumofiso.pdf
    • https://mamo-tato.ro/userfiles/file/20732797376.pdf
    • http://alpha-th.com/userfiles/file/80103190991.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/35314b4c3b8cfdd18c0a9d9ce5ae484b/52571759460.pdf
    • http://velo.hu/UserFiles//file/wenokagunavadukawofelu.pdf
    • https://paroles-vives.com/ckfinder/userfiles/files/95785575925.pdf
    • http://stolizstekla.ru/userfiles/file/15440416193.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f88613974---20988728433.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160820e15bf136---64083123483.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2a883840808688e45f7cbca4eb6a9d1b/38836886119.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082feb902d94---gulumasiwufo.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/d277354f23dcecb13dc6fcaf1be942a8/636249499.pdf
    • http://portalkucharski.pl/app/webroot/media/files/48219960216.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3971d4d2---61181763005.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/759ef8c077af4ae478ad2b407164ed2f/92238320730.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5cacb70d596ed419709e2d8e8e502b5e/dubaxagepolejesus.pdf
    • http://enotecagaribaldi.it/userfiles/files/89282416083.pdf
    • http://goldenpeak.it/userfiles/files/zumesi.pdf
    • http://shuimotongyuan.com/userfiles/file/wamajebemunezij.pdf
    • http://dilimkebab.com/userfiles/file/99329616132.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/jhmjrkr5v62hedcj8kcm92hkn3/86764574427.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/logukomogakowatikalov.pdf
    • https://hospvetcentral.pt/site/upload/file/20651007458.pdf
    • http://tpdw.pl/userfiles/file/36972568047.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4e6d65c5---76765319220.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=traditional+japanese+houses
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c7.bin
90a153a7020271044fdbae12d7aa48b1e73b7da7992ba57d0fcf7db4982ed88a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 16216 bytes
font_01_sfnt_off0000ffd8.bin
9f2874e8d497eae0d3af51f509671fb498d16556087b1c3ed4cf2131b82adc55
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10680 bytes
font_02_sfnt_off00011831.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11831 16792 bytes