Malicious PDF — malware analysis report

Static analysis result for SHA-256 482cd934731ed291…

MALICIOUS

PDF

85.2 KB Created: 2021-06-30 23:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6fa421f1fe270a1971d7d6bdb5d4285 SHA-1: d7fea56a00a1eae295d72d1c7a6919d36a33e4e8 SHA-256: 482cd934731ed291a3f32c4d549260d3a3d2d896fd3ce4273c8ce4754a460699
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised CMS platforms or disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. No scripts were extracted, but the structure and URL patterns strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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 https://cructi.ru/uplcv?utm_term=a+prayer+for+my+daughter+play
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/70627406083.pdf
    • https://leganordavigliana.it/uploads/file/zigexevozosixozagax.pdf
    • http://midel.me/userfiles/file/93212847265.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091f34480fc2---14757350954.pdf
    • http://belst.by/upload/file/61365856352.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/nowafulenaparawusepuf.pdf
    • http://revucue.com/ckfinder/userfiles/files/degobajowiwizokekoru.pdf
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/71401575712.pdf
    • https://technische-dokumentation-hoffmann.com/upload/files/86933860179.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d2b6333a6---51199649718.pdf
    • http://oikoscoccatoarchitettura.com/userfiles/files/dezogibugipunudogase.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/1psmeniteiiganns6o3r8j0du2/janeku.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0cdb65e03---sapugezopazijexop.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pim30cul9d891gv0nme4pgrej5/27720904477.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b97d0676ef---97681210734.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0b5df84f---lidagerir.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909025677ed---gofudokifosudibozax.pdf
    • http://temple.mo/userfiles/file/77449987251.pdf
    • http://designbeginnings.com/upload/file/bavij.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf8a5bf773---57763533485.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ccdddf541---sefonowu.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc52b39c19---73316671858.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/198bbf65b1300f1146a0924168fe9730/6000141817.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/dexudojif.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac89a58088f---lowapanetejufageguf.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d97239fa---74785126871.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb426e8a2---giwamug.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_off0000e733.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 16792 bytes
font_01_sfnt_off0000ff4a.bin
b844ba13b5d2a9026b4355c4cb597c836d2376bc55a25cbbb85eaeb3ecb2c8cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 10776 bytes
font_02_sfnt_off000117f2.bin
af9121f3344eb4da365b1e78489c4ea611794f9827a00d9d21bb5996146bddc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 17460 bytes

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