Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d231517cb73323…

MALICIOUS

PDF

77.5 KB Created: 2021-06-27 05:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c131aa522c7f00661bac4afc820c28e0 SHA-1: ca95421f639554edcff582e21f8ceccf6e40168e SHA-256: 76d231517cb7332358e1a3ef986cbf2c8ecc5b9cc24da35dcb26548214ff6105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the linked domains suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sportschoolindex.nl/images/uploads/bukal.pdf
    • http://caigeshi.com/uploadfile/file/2021061720294073499.pdf
    • https://notrepanierbio.ch/userfiles/file/zofoguranowopomakipokazu.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f6c91debaa66bcab6dc4524a6d896cdc/xasugetifedinaz.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ad5c04374fd1e9f14a2d324381c38fcd/27443443492.pdf
    • http://andrewsexes.org/clients/867461/File/fowiteti.pdf
    • http://ajivikafinance.com/userfiles/file/latewibifekuperajajizi.pdf
    • https://planet-for-events.de/userfiles/file/51365587708.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c34906315d---wetevoke.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcc47e9014---tuwolefimebu.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/mm47kh7el7emjq0tbugqj8goj0/86821517883.pdf
    • http://accessiblevehicleservices.com/userfiles/file/14793238554.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa60d6f850---dibufuxubojoragiso.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/56eaf4e45a496d1a3bb1db57d4e71199/xowizasovamedewefalupusem.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nomlpsssnq99gdngjgm747qgh3/19330978948.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16082f311e294f---88719436529.pdf
    • https://aimhc.com/userfiles/file/menixiwejumozibo.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/ae57240b1ee31e81807b7625b8fc5c1a/66688555720.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3bc01c5e7832236d79f25bdf693c0962/51809708313.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qgi3iv0q8vpqreib6ahf41pt37/tijalifomifemapa.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c3fb91a8---88344097947.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc5fd13ff---vamuresexizevisi.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608f47aa81cc4---7256719230.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d22e8b545---lagegesom.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2aad06f2e79e21b2862098f776d0785f/xurefuxepiletapazagadaku.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8q6nqvc9tf1leihsavovvij3u1/gorolisopit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=little+people+things+that+go
    • 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_off0000cb19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB19 16792 bytes
font_01_sfnt_off0000e330.bin
a6ff68ea7cadb80fce8f61bf49d9ff434d7f63a57c2aedd4f620fb003005002f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 10388 bytes
font_02_sfnt_off0000fa9c.bin
71637f0e17295042113fe393616c46580c8732f58995d790be2aa7804b319bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 17600 bytes

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