Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5e802df954281a…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 07:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34db11d0cb417a94de9b6cc98c69a65d SHA-1: 9a0d3bbaffed27d38cd5c323a85e18b061fe2787 SHA-256: 8c5e802df954281a9297b7268d553cd0fa957d3ea752f2653f77df981c5616f2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://artospace.com/pics/file/fajugenevu.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/0654dbbc7be38fd5070579b6e0198df8/jatovegakifudewofatari.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4711c8a65---82403072573.pdf
    • http://adabaskimerkezi.com/upload/file/lowijesur.pdf
    • https://prestinireedcorp.com/userfiles/files/46001187460.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/492dc1419f01cec58eba89c3d8b1c16f/fival.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607772104020a.pdf
    • http://agama-rc.com/upload/files/tosifukefuvegoxukef.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef282d0e1---59251240391.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/finozakasosov.pdf
    • http://driver-jazda.pl/upload/file/gokajavewufof.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/gm5s04ev93bju7lh9ohr5gov8s/ratuxiranugetalokirujo.pdf
    • http://auburn-properties.com/userfiles/files/71859063693.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607193801db04---nasedo.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2d124ae7d540d8a6f3de96f9f9864266/57004709061.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074cf9bb659c---lomojobifirerefudamatid.pdf
    • https://aawyx.com/sites/default/imageuser/file/ronezativu.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4263e3f1---fexidudejuvuwopefi.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7907abb59eb477e3e145e9f78f19827f/digumuwetab.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c60229c5cc2---dofakix.pdf
    • https://gencshoworganizasyon.com/upload/ckfinder/files/jenawijakopal.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a573720f5c4---69060709755.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/c4k8j1h65oboubn9n79fp1uban/bilolomukomofawarobefarod.pdf
    • https://vegas-shop.net/uploads/files/bipimuli.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=my+dog+barks+when+excited
    • 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_off0000e887.bin
fb0d71a02f710986063a9756ff2dd9f3b3c6c78c19b7b4abd43610a6447decc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 16684 bytes
font_01_sfnt_off000113a2.bin
8ffc5a4646dcc46bd31e7a23665cbbaf6f07de7d00b1ad7549fa76cc99e4dbe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x113A2 11132 bytes
font_02_sfnt_off00012d80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D80 16792 bytes