Malicious PDF — malware analysis report

Static analysis result for SHA-256 1293962036a0adc8…

MALICIOUS

PDF

88.9 KB Created: 2021-08-02 03:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95e231c7266812f1a628c631e3570571 SHA-1: 88ce78408d4ee6060f5b30a022502d7501c99a61 SHA-256: 1293962036a0adc89946652963542994789eb51fb31ad201aafba9bfadb3efba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/nj7lqf922g8len7g803u8aeog8/99083389751.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/4ec8abe6d10c95783001a96735f0e7ed/kumafexudodozopojez.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0def5881f5a40ff5d2cecad934281259/fenavexovotuforaropis.pdf
    • http://www.hydro-tg.pro/upload/file/guradululezowejabozewuk.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/xevuvuvatujapib.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac1eb68b3---66949403994.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/119d14f8e8c40e75fc38117e4f46ed60/vakuwura.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b1b03b2a228bb3553b7101e3feef6bf/22476853677.pdf
    • http://wecans.net/_UploadFile/Images/file/sawawum.pdf
    • http://fkhd.cz/data/img/22177273941.pdf
    • http://namlongprojects.com/images/uploads/files/96143239626.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20d9163ab---65585263858.pdf
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/nipuletomorawe.pdf
    • https://ludifrance.fr/userfiles/file/62106865274.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df66073cf9a---95497550685.pdf
    • http://mahnomenalumni.com/clients/879209/File/46707360181.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/14a43eb0fe8da1779e5dc011150c3596/jerusazuke.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/isaplhaenjd9pivn8gbtlcq7u1/koranolilajusilew.pdf
    • https://angkoronetour.com/userfiles/file/xokesorarinilemebisozeges.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/pobasibanizorigoj.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32673ecdb---tikakokojixifa.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a559e71d7---73644735565.pdf
    • http://www.electricman.in/demo/frontend/web/uploads/files/zazasemowagetawowulotit.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6b0e1df71---60568641805.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+put+batteries+in+graco+swing
    • 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_off0000f2f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 16792 bytes
font_01_sfnt_off00010b05.bin
d496d5051a404c93d46fb03bcd7852c14b186685b55042e52fab3aae8519d0c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 19416 bytes
font_02_sfnt_off00013bd2.bin
d918aeb2229c3f20607372c9d6e0267bbff48c54cfa676e56188e278f53fedfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD2 10820 bytes