Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab14b580e4a5d94…

MALICIOUS

PDF

88.4 KB Created: 2021-07-18 18:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db7dd4a80bfe33419c1f8a9bb4d96fb8 SHA-1: 02b906ccf600cc54359c009a47a3b75168bacf84 SHA-256: dab14b580e4a5d94cf07deafe965d6d61d08413b778a41ec05d5b9e85cc6a611
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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://banghenails.com/upload/file/66282932534.pdf
    • https://laplacedesstores.com/upload/file/kuledosojubodezexuvewevep.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/1r4rn8f4p26ivuamun92nn0v35/26320927230.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d7303f3c627---nexowoxazukikixelalavu.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ro3jocu9amgg59r6h9ajhptc2p/jowewaj.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a73ff7154cc---kowuzazuwezisudota.pdf
    • http://blow-w124.com/js/upload/files/tidewijalim.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/37ad4f4214e077af29a0bd62bb74413e/lunuzamaran.pdf
    • https://nestaerospace.com/uploads/file/3653188069.pdf
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/10393675557.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079f38e6ddba---bikubixizad.pdf
    • http://jnnycc.org/userfiles/file/kunipemubo.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/82a50f12fced5e53ea0d03ffee14902f/jomufipigeralulexef.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/ridutarisopofobasib.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d825e839a2c---sofagodelu.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781af7c5135---fatoxipumojigoparemeliz.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63eff3a4ec---20881219335.pdf
    • http://akademibt.com/resimler/files/97565512417.pdf
    • http://mtsskzy.com/userfiles/file/73178580085.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b77e3922035---79540521118.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607131c22cd99---wexed.pdf
    • http://psmpetcare.com/clients/76030/File/41051550707.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af58fca791c---legovezupefujidovadiveva.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160853e27f2323---zomufodoguwofo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+load+a+pdf+to+kindle
    • 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_off0000f51d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
font_01_sfnt_off00010d2f.bin
e75cb51a3c1ac714f24ebc1d8ab96d3d697d22cce434767b85c3ac398d2c5c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 17420 bytes
font_02_sfnt_off00013b0e.bin
89c9418e422edf4b4e7d7ce4cb9429f59ff8d39d1d9af205df82833c58237a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0E 10392 bytes