Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c7342a08d03979…

MALICIOUS

PDF

73.1 KB Created: 2021-06-27 01:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49029750aa983258e46d7a8252097380 SHA-1: d84a5c62ba06c94fe63bd56073f8601096ace070 SHA-256: f7c7342a08d03979adc7530e45c9aaf7b7325d7f61f0776029eba1860e1baff1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=sun+le+mere+saathiya+mp3+song+download
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae82df4d0---wuwofopefidamilejog.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/8bcd79f02aaf521eba91bc22c4070e61/guvubofaridividiwatix.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d60ac5f1bb0---liderabokagitepemoki.pdf
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/mugonopizilixi.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/310o5ngpq8nb143mjqqbv7rbum/58475191979.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad15e65bb---wedixuko.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/0521bf2aa97c9d0136d514ef9ba84c48/29055463815.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160702dd28aa74---kakarepowatozugimavo.pdf
    • http://automotiveenergy.cz/userfiles/file/58508161120.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/he3qfpnevilcnu74p0026cfjt7/75438373643.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4fm9taqj6t1ekui51ua01ll16f/degurana.pdf
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/voxumugabi.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/d2a8b132786cd8bbbb803efe1285b76c/vibejovomolo.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6b643aaeb1479cd7c25f61e06af875c4/kasipukamoxumafibobub.pdf
    • http://sklepjola.pl/userfiles/file/vabulelisezodanagutanona.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e90a94c6a5---telivadijolivojobimix.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/jagutomu.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712b18356f0---jererusukules.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c1edc54c1---foxadaxuzamitikavolosig.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/69467579999.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5aa7bb896---51569804568.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b81f396e---1044991927.pdf
    • https://ceccarbotosani.ro/userfiles/file/lamifup.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac809c9865e---4164564820.pdf
    • 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_off0000bab9.bin
f32fd07e832738ba7f908516c7c73d7941b68f2d35e73334ccff2f7a9e908134		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 16148 bytes
font_01_sfnt_off0000e469.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 16792 bytes
font_02_sfnt_off0000fc80.bin
bb3555f57c73452d66c77fba75b343affdbf33b55e8dc35baaab178cd8d0b14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 11384 bytes

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