Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b42f47be8640c5c…

MALICIOUS

PDF

90.0 KB Created: 2021-07-02 22:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90cf73595f97c51f595d1b9072804936 SHA-1: 2f658ab9ac5e67a0908ad73cf7dd956c2cc682cc SHA-256: 2b42f47be8640c5c255d9ff3d8863e804b3feb4ef014d2b61cc2b675b1c855da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains an embedded JavaScript stream and numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://guides2alpes.fr/uploads/file/givipifukude.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/r9o02m54u39q0vf1itvgu702pp/panimovijiwuwobuze.pdf
    • http://solee.cn/ckfinder/userfiles/files/71521160929.pdf
    • http://akicgiyim.com/userfiles/file/33943750568.pdf
    • http://euro520.net/userfiles/file/1623106187323269347.pdf
    • https://aviatroglo.fr/IMG/file/robegikijutoxaruw.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/69543040792.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rfbeofhm4rapjtr1te6huiifd2/15082401614.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa262d4dc04---19194731609.pdf
    • https://maintogelonline.info/contents//files/69590109532.pdf
    • http://banghetretunhien.com/media/ftp/file/dajuzaluvu.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082cdb883bfe---wogijunebajekoxu.pdf
    • http://eltonltd.ru/sites/default/files/uploads/jiwolaba.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/3926365447.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16098ce838c726---35914308328.pdf
    • http://alfavs.eu/userfiles/file/77942990685.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c42524f832---1206051806.pdf
    • https://soyana.de/js/ckfinder/userfiles/files/78170101479.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7fedef5e41b9de388dfd66701f97a8a8/kafixenejafo.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/c5520d1c7c39ab9da3940e6fe5f72f8a/kufezalisanejisofux.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/762302db8ac2124ec2c093451314de39/sozofivoxe.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947472c99df---47701570389.pdf
    • http://digitalpolicycouncil.com/imagenes/file/mafogeselaleliziku.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607480db41e6b---mosixaruliwaj.pdf
    • http://bacvietexpress.com/upload/userfiles/files/tozideku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pink+spots+on+face
    • 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_off0000fe4a.bin
7da6c7322ece58bf5593fe5b4cbdcd45c2ca2a538375b94698deea99272b037e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 17224 bytes
font_01_sfnt_off00012ade.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 16792 bytes
font_02_sfnt_off000142f5.bin
a77f65c0efddee81191116256b7a71fed72985767761788f7def66057bcf18ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x142F5 10420 bytes