Malicious PDF — malware analysis report

Static analysis result for SHA-256 078fdf42f2c97bc4…

MALICIOUS

PDF

93.9 KB Created: 2021-07-02 20:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4ecc3fada6f6390412735a76b4b37cf SHA-1: 4c6ac44b87d75d5bcbb19280882a38334e11691a SHA-256: 078fdf42f2c97bc420de924cf6c4114db2356e61fded3484fa49bd824ed27c5b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://parkwaywest1974.com/clients/861606/File/81530776990.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/eavgomseqsvj1kdlj2jba15spj/1518479286.pdf
    • http://jorkurojus.com/userfiles/file/73982202674.pdf
    • http://aite-materials.com/upfiles/file/guvivu.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160caadda60022---77022400975.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/42bbf2def1cc4c28f8d36a15cc32f680/lolawalakunexuxexamasote.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf303fd6390---vazijinefapixik.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/8891aa002cc88a8d604fc0d1c5e62ddd/wapipolusabenamerogijegar.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/fulinusule.pdf
    • http://micronforgacsolo.hu/UserFiles/file/73897872923.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c513185d729---65694578784.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/it05vfadmicq7fs8h9f3pt1tv8/50883346711.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/samefawub.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73f0d75c4---51028898274.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c60f8a0b16a5c1d45c848b7d17784d1c/musajozuguzexogasivegu.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/xofikolivepizakuvutesumof.pdf
    • http://standartbio.com/fckfiles/file/65180050980.pdf
    • http://babamoleskine.com/files/file/zenodibalavonanezi.pdf
    • https://mfdesign.hu/files/file/xozejazaxos.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/v743t6sk0rcigglh4jpop3csue/desewujigagivofi.pdf
    • http://dobre-jaja.com/Upload/file/gurixo.pdf
    • http://familiehollander.nl/images/uploadedimages/file/nofuzuxata.pdf
    • https://telewebmarketing.com/FCKeditor/file/zifarebamomodebuv.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0add1e55---20497064060.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+spiritual+in+art+abstract+painting+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_off00010db1.bin
261dff393febf0607a9c31c0103c8d15e28ba1d8b7d23e565d1da4af8ad0685d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 16916 bytes
font_01_sfnt_off00013952.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13952 16792 bytes
font_02_sfnt_off00015169.bin
d46ccba74b676a438d0d9fe38fcd8948c757ae4d4374de023a4851ed904bc264
pdf-font-stream PDF embedded font (sfnt) at offset 0x15169 10980 bytes