Malicious PDF — malware analysis report

Static analysis result for SHA-256 448ba6800850dbbc…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 05:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ad806e84ca5b9a69793927315fe9d4f SHA-1: f441a7d353826e468b2969e7b2395e3ff8c27526 SHA-256: 448ba6800850dbbcc619b8ba5e9c0a3e3fa373150801d0c5f94f954ca46c1a3e
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to websites hosted on compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites through a link farm. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user interaction goals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a021bca9df---40306073476.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/juzabatopalebojevof.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726d023c9b8---legadavoz.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fa2f447d5---48026872147.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddde96d961---16390115458.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/080607c6729675c60865170d6166730e/17845954769.pdf
    • http://dansensvenner.dk/imagesfile///43255778406.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b1b7dd80427bd3c323b21603186b2c09/5727229727.pdf
    • http://incucinaconalberta.com/userfiles/files/sozumumikoxowimetopuwima.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/vo4ggp6kn2ilav0u4suqikie3d/78551966085.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c54e43465fe---6365015002.pdf
    • http://www.gabrielamaciel.net/images/content/file/favalozuterumunubufubizo.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c8610ecdb---84228920710.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/2062c61b16572a9e1db2440db324fde2/jiretixapupon.pdf
    • http://nakamurasangyou.jp/app/webroot/uploads/files/18295215310.pdf
    • http://php-lounge.de/userfiles/file/44645637714.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/c1f4dd8496b99662e602d214909e8205/44825303142.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e973db46---25580405856.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efe67d2793---7452036004.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16201972824516.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/dadd5e95b43f243b17fccd9837eebf4a/80523807272.pdf
    • http://anandtouristcorporation.com/uploads/lozupedujexatitolubemo.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92e1e7360---95398368252.pdf
    • http://energo-market.ru/sadm_files/16385958536.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/1b915e1681b740c080e087412b804ce5/77059276978.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c762185227414aa8c105c7cec98cf454/8309340523.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=power+quality+mcq+with+answers
    • 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_off0000e8ea.bin
f9bb40d43dcb7fe93144fad7e0082b6a127cd436862519b990147a283cbf37df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 17716 bytes
font_01_sfnt_off00011631.bin
8699b0520779308a6758c19d31deafae98c99423ac9f850bbc88066b6e1a006a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 10940 bytes
font_02_sfnt_off00012f76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 16792 bytes