Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f3c122c7233d63…

MALICIOUS

PDF

87.2 KB Created: 2021-07-10 09:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9412c849697a74a649105348d7559d32 SHA-1: be7069d3be22ea0bb5d6f3318831722752a36865 SHA-256: 74f3c122c7233d6307f7d3dd5c28b8c69166843391ff61c9e983cd2052eadb9b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on disposable domains or compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9500

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://alexanderkanevskyartistbiography.com/clientMedia/file/42451048759.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c3d08c163d6b99f67501a312aae94100/60029398227.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7b17c17a564b25d6e912a3244b412941/15524144508.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2acebc03b5841135e145e90ab62d5954/wemezukedogurivorukesej.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/juzatedumejeserubereburix.pdf
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/linefuguvupudilaz.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/280f29d11378a5fe6b087f8b386c12ad/nikew.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5aeb62e95---95666590352.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/8rqtp78pel9e804ltnrrva99e1/36718153591.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d99a0ed32f5---2296070697.pdf
    • https://zegabilisim.com/calisma2/files/uploads/dowaladesu.pdf
    • http://altiro.nl/home/tjerk/file/zitezejituf.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/1f78451b3ba89309b84f41f1c3925b35/54710695627.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b319019a3---zotigojutepotopojizaw.pdf
    • http://ahlhy.com/uploads/file/082005552537.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d240cf6d07d---41777749784.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0f11af6b---39241389115.pdf
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/97940866846.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/11c5a1ad5ea0cb16fc851bbc9c3f5096/bomab.pdf
    • https://xn--80aaijzh9b.xn--90ae/documents/file/naveramajonawabemurivamu.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/cf444eab622361faa11c068f3c0a63bf/filidesudopejejepap.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8524dff9a---zuripekirapafokifidudelo.pdf
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/bapesusadufenubuxifixakix.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/e6997d3a90ad1fba018764f398280b03/59957137405.pdf
    • https://loctra.net/userfiles/file/5165004474.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jqvleq561o81vovsbfho91n04/95771280737.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/35f2d420a230c3f321810acb4c718698/zipufasabegutedo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=introduction+to+computer+chapter+2+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_off0000f1f6.bin
f1832e0f5000bd0a714ae685e9831687089df6947c19b9a3a5f1739cb0f8e5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 16932 bytes
font_01_sfnt_off00011e3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 16792 bytes
font_02_sfnt_off00013652.bin
fc652c5b0a0f497169aa6ee20bf2afe92cb7b5a4b6b483328387413e871f0d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13652 10844 bytes

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