Malicious PDF — malware analysis report

Static analysis result for SHA-256 c783012f733d2c2a…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 10:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9faaec78b4cc3c7c0d7fa43e8e9d4461 SHA-1: 079ed3ec978ceb4118198ff7416b872b189388d7 SHA-256: c783012f733d2c2aaa49f38f75cdd41ef2ea6a4d0c4ef0fc48018267e430276d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to websites hosted on compromised CMS platforms, likely to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://ludifrance.fr/userfiles/file/pupupilubupopagojudatofaw.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28663e0a3e---rivibitu.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/19p855e03ta9katdin5gbaq7jjh8gmlj/jogadewavabasute.pdf
    • http://beloezoloto.ru/userfiles/file/22936544559.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/56c46f393856947262d0fa81e7665a6f/41685464433.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/jizugig.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4404f62246---wapibojib.pdf
    • http://meble-tk.pl/userfiles/file/76988443740.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608216660a227---kudoxurenumazu.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oinnqpvudlmd64dlgkie5p110r/37588424286.pdf
    • https://steklo-shik.ru/userfiles/file/fatumuzevafaxiwamavem.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe6f628814---72144054276.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/96304072475.pdf
    • https://baxsporthorses.nl/userfiles/file/degiv.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad341cf62---40887915685.pdf
    • https://yuss.it/file/30128823411.pdf
    • http://alexlunacoach.com/img/editor/file/8488946097.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c596a39b8042f398574f75f85bc842c5/suforubadin.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/mgmn7hfr2oo6o6ltdhda0sf266/67844270040.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608525539706d---51129346159.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/fd96ff2c0344cd05085aeff53206199a/tozirojifon.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/e9lsbvg7aiie1pdrd3k4oq1o05/zobesubumigifagatozi.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/pomosapiwibubebokosigax.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0b5819f50---79631159496.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bef3eda08a---95154091887.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/1e2010ad0fbfbfeba905902471846534/95187044103.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=to+inform+meaning
    • 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_off0000eb7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 16792 bytes
font_01_sfnt_off00010395.bin
01464c23d0fe596036fa5d7b3355860f73a4369375cfa7e002c25410931a91d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 10208 bytes
font_02_sfnt_off00011a6a.bin
2181943e2540093cb3922951c52391d073aee4670623a9a65d2c0213033d6c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 18936 bytes

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