Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dc1c84121fec19…

MALICIOUS

PDF

96.8 KB Created: 2021-07-06 15:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eee69d3324105e1d4e86dc7fe553b289 SHA-1: dc9a242a4eb60d9f9d61ad728cf72ab491961e2a SHA-256: 98dc1c84121fec193f185247fb5748aaab347dd65be034e719d4f61a4bb2306b
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to compromised websites, indicating a likely phishing or malware distribution attempt. The presence of link farms on disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://asokmontridental.com/userfiles/file/39904152606.pdf
    • https://conexkarvan.com/cache/fck_files/file/41641140165.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607063b75a345---lawowozosu.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/um86u6pihken5rapabhdgdq36t/63371869530.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/122f7807072888fa13522c574c90891d/gufasajevazawolekadedep.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8f0cbdd1c---duniguketesiv.pdf
    • http://on-video.com/movies/movie_data/file/zanefufodelutedijogep.pdf
    • https://isleo.com/i_photos/file/sudebiwibizum.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091e15b6cc88---20411106701.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/5rte1f6r8bb9q7o1e5qq6k9qrq/lamusinod.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8fa73956---punisomezedekewatinaj.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54a166251---radepavujesepotowo.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160809b375082f---ziwolanupefexoter.pdf
    • http://ags-sib.ru/ckfinder/userfiles/files/60456097965.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/5362fae1f0af17423fb763bd01e04e9f/vugiwawowebinuru.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/68dp3a74k7rv3alrn2hpl6p7f2/kaxigereveko.pdf
    • http://kimbuunguyen.com/uploads/userfiles/file/46938365122.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b1613b14dcb---baraguxoboguvosozu.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/89073861173.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a5e9cd9c5---88986116021.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd0ec219e3---64181903736.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/489ca1e6accab7367136ef9ee4d470f5/14138675667.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01e70e014---birar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=nine+tailed+fox+episode+8
    • 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_off0001194d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 16792 bytes
font_01_sfnt_off00013164.bin
dfab2088436f1bbf1a2f7674b20d77ca803de83e180a36d87075d7bc86a203c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13164 10680 bytes
font_02_sfnt_off000149fc.bin
932b99097d2861de282ddb7a1e104deac9669743f335e2d373e8da3da4eb068f
pdf-font-stream PDF embedded font (sfnt) at offset 0x149FC 17052 bytes