Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07e3c2683a82fd5…

MALICIOUS

PDF

88.4 KB Created: 2021-07-20 02:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5eff6058cedd5c37dc939572222bc304 SHA-1: b8b66d65bb09e87e93ecd46ebbed98a67a57dacd SHA-256: f07e3c2683a82fd5f1e0a0346cea99782db94cd001f016e248ce9b978ca5ec23
156 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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS upload storage. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e521185c6e---furuwilufexugiwexun.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/03fa441f84da702f068082a303dbcc39/62460150614.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/1c8f662af374275a2f99d523d1046da6/67050595648.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/773mu070923hqq7rk7u2hfje7u/temuxuvazababanuwite.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/19c8eac4d539a384b438dacdbe061236/6196133903.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dc4a8446062---zazaji.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607631b83d0cc---zupasevap.pdf
    • http://aweibel.com/Photo/file/64058040905.pdf
    • http://mariautonoleggiomarsala.it/userfiles/files/befesamijanujolok.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/t8quio4gkn2fj496ccdp27kino/59864508129.pdf
    • http://ciccioinpentola.com/userfiles/files/texoramizozenom.pdf
    • http://eprdel.cz/userfiles/file/20145993377.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/263b9b883e579bb883eaae0966b9bdf2/lolumexuxexiz.pdf
    • https://apsco.ly/userfiles/files/88779596484.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078857d03bd2---kotaduzitigakis.pdf
    • http://ashioke.com/images/library/File/jutile.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a7482566e60---wufijilobipe.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf413b77404---40013876916.pdf
    • https://equator-maritime.com/userfiles/file/15226330343.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/sp9ud2f87sbi1db1fs7qqvtdj7/97351753797.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6e205841---62491942536.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=oobah+butler+vice
    • 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_off0000f26c.bin
2642f5ff2d6c1cd7bc2df4882fe96d0007390a9afbe9278c5405bc1643d92b52
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 10384 bytes
font_01_sfnt_off00010a19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 16792 bytes
font_02_sfnt_off0001222b.bin
2a7e0dde77c15d9cfb7e53f53ce556354ecaeee7b858912417cb442d35856854
pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 19200 bytes