Malicious PDF — malware analysis report

Static analysis result for SHA-256 0beae0d51b09f5b1…

MALICIOUS

PDF

93.4 KB Created: 2021-08-05 07:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56ae3225b47268d612212534a22e19e6 SHA-1: 5ad8a2cec818a787f41a026975212965efaafe9b SHA-256: 0beae0d51b09f5b1eca66fc874c0d1a38e597c2e401a719c04df540071ac90ad
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and the nature of the link farm indicate an attempt to redirect users to malicious content, likely as part of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/e22c8db5f73f28e75a92866a994a9fea/xekaguwomejirit.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/eebc31e6b5aa1caadf934ade354b165e/josutitiluk.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/03d8165ce62e920c61be0bab1df06725/62932487494.pdf
    • https://amitadevnani.com/userfiles/file/roxumuzonuredosemawekorav.pdf
    • http://jjkxmy.com/upload/files/202108051149065510.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094723b182f0---zogutozunuriwiwidoz.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/fc652b251d328fb650f35c9b3612be1a/junumaxuwenorodixixifu.pdf
    • https://thehero88vip.com/ckfinder/images_store/files/92089699287.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/f8b2eddee7793e5546478e7fa6322f45/zabedawupuzelijixotun.pdf
    • http://ediliziaunoaventi.com/userfiles/files/kutepepaxajefib.pdf
    • https://claudiodituri.it/uploads/tevulinekomib.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9fcad703---pavotubatupawabewolaxedep.pdf
    • http://studiopetrilli.it/userfiles/files/pujozaxutojevexu.pdf
    • http://fra2ange.it/userfiles/files/jogatibonobowexo.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ad45103b8a0dd39701c436708a3c732a/gasegovolizikoxopix.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e534e99e5dc---pavuxefap.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160fd58142c318---56596273425.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7893b94d---gudutipazasesizezaxi.pdf
    • https://activepymes.com/pub/file/19570527959.pdf
    • http://chono.mn/uploads/userfiles/files/37128263904.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/cncqot9i715sic6335t65u8anc/peminipamun.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9fd9d8418---kinajibatagobusabiwe.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/039v1oc69o9a67nelm6kefn135/59008688531.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16088711911080---juzigiwuludevebifov.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q1pg8uaudfn95hfrg56lb85uf4/rimulawodezixujajurobed.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bloons+td+5+mod+apk+iphone
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd37.bin
949ba38b377306c13ab4136125d98396c88a8d086bbb0c9c0ddc9b59c925bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 18176 bytes
font_01_sfnt_off00012d4c.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 1692 bytes
font_02_sfnt_off00013554.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13554 16792 bytes
font_03_sfnt_off00014d6b.bin
70a6ca0b1c378524b0e27d7f3ca991ec26c6ed6a655f9770068dadaa1171ee50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6B 10836 bytes

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