Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a479c1e0510811…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 17:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c2df858390b7d9250aa4a06eeff0724 SHA-1: d56e91b0cf682592033112d7044090ee2b3b8d4d SHA-256: 60a479c1e0510811a8baf4e2c8d97ed4aa3bcd123b48446338795ad6b64b37ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and numerous external links are consistent with a malicious document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/de941f18db8650a6dae2f85b7845ebaf/bexisokosarir.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd542d603---sovopulo.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160868d24d0695---66453082710.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779a98ecf5c---mezifirad.pdf
    • http://itkaufmann.com/images/fckimages/file/51873641184.pdf
    • https://deniz-sogutma.org/img/userfiles/file/sawulowud.pdf
    • http://asupuro.com/upload/save_image/files/91817605162.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/g03uqg22hm326gb9hd0ddsgbbf/xuwekesilaretup.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d277327e6---19445546735.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/3f23a8492a5b53838796f2b8f833b30b/25345629158.pdf
    • https://signika.pl/Upload/file/tolenilexazarugoxeta.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3b9e188399f0ab297c47ac18512a2c4c/41505244058.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/tlgn7d79b74cv0rvaho9oscodf/fixofiga.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608167fb37487---ziteposafusewivojafol.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/3f3b1a8637fc85ac38a5269f4c9ca4ef/manoragitogepozizodonelad.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab24f7d7f98---91477964432.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/u5en83q2fncttuhtavaedsgi6p/wugipinig.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607924c5283fd---82495023321.pdf
    • http://icltindia.in/userfiles/file/34683392882.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/732764325.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085096598318---vozezamadosapotikutu.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/t1ffldjvbha8e71uqm2inrlc04/11480877724.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/uhm5c9vsfp4h74th4emh7h2t6s/xabizireperaj.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/81377423647.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba24bbb0ea4---59069261297.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d28cf1d669---nagevexuvi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+do+barred+owls+eat
    • 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_off00010077.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 16792 bytes
font_01_sfnt_off0001188e.bin
f75e7d9271d4befa823445e341a9c6788c37f6658f88620060e21d7ab4afdb4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 10368 bytes
font_02_sfnt_off00013032.bin
6379ec5774e0f8dd3b62d16b070b740c349fea86c1fec1da196ea8ffb64499bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13032 16956 bytes

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