Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbc16d96653fff2…

MALICIOUS

PDF

90.3 KB Created: 2021-06-29 18:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eeee5b52c377ba8f4d51a33f4d8c1385 SHA-1: c043a470db0287511311f329312245fb1b688d69 SHA-256: bfbc16d96653fff25f3154b1827b43920ff73ab4f4c6ac937559587fb275296f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content. The heuristic 'SE_SECURITY_BYPASS' indicates the document may instruct the user to disable security software, a common tactic in phishing and malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904d3b5f882---zesixur.pdf
    • http://thepnguyentran.com/media/ftp/file/lazave.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cbf9cb82c---gufekefugunolumapu.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2e3c60862---refakuzewipebesuninu.pdf
    • http://parejalecaros.com/adjunto/upload/fck/files/55838881134.pdf
    • http://micronforgacsolo.hu/UserFiles/file/sokode.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/986afa5e767edea0922f69343b165de9/zeletalivetaworodupa.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/31924715520.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d975b8f5---31019609477.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607a275ba2ed9---28517289096.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b9e4m76ce9upk2hej5uv288306/77437301998.pdf
    • http://kasystemofkarate.com/clients/861259/File/91315200704.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafe568bc46---tilidezosedilep.pdf
    • http://waypl.pl/upload/File/rurusexofekuluzivolab.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/7e1ed2b26d58b667db029009d4b2e774/sutifujutewunogosupeb.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6c1cc88466c9bc0bc7bbc2fff166d9e8/rajiv.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/midapajozifisa.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nf16nds8cifklfc65lts64gfrs/sodaminalojexudunumagupid.pdf
    • http://dentalcenterstudio.it/userfiles/files/gigelubimugewifadul.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe4ca508a4---38012282498.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/k21gq7bcc75r7alr2ajb0q5do0/93521232029.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ckheu2klae0rk0dr1lqfj46ik3/xodoralaxakenujixu.pdf
    • https://twr1115.net/files/fckeditor/file/refupas.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/9cbb35cce0839a363cb126e0e4071d92/98177463803.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b319ba86b58---33121563252.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=you+require+permission+from+administrators+to+make+changes
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 16792 bytes
font_01_sfnt_off00010aae.bin
7f7a7193890cb8e5e14eed2668596ce16fe6c5045384c265bf26989eebc8145d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 17500 bytes
font_02_sfnt_off00013856.bin
164b17f13be751c428b8a7847bfef4401e4c17c2bf41cfc2fceec83f5d69c6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13856 1728 bytes
font_03_sfnt_off00014090.bin
742c914c8b3665e726034b92d5880a6888dcf783f21a2f5f8d6db8925c86c84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 11340 bytes

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