Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60751c52d0a6ac0…

MALICIOUS

PDF

108.2 KB Created: 2021-07-07 10:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 883b083bbbd5c53fed6f6d62e464aa2a SHA-1: e89159e0d83793544a9ff7b7e5d30cf4bfbab12d SHA-256: c60751c52d0a6ac06908982a77e8741f599b6c8aa06fdaaab9f0e079d45fb444
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm or phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. The document body is heavily obfuscated, preventing analysis of its specific content, but the heuristic findings strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://ludifrance.fr/userfiles/file/77686653737.pdf In PDF document text
    • https://muratay.nl/userfiles/file/vopetuxatuzonugorow.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9126841cc---pizixowe.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/524083fcf3279405838d00245b0be575/5288745018.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/14074644769.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097459fa57f4---34541974931.pdfIn PDF document text
    • http://mahlkoenig.nl/app/webroot/files/userfiles/files/vatinazesesuwopuxabez.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/cdd475ee346d53110755deb888d1c552/xumeginelegoleti.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/lamisavefikekilipa.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ppna5v732ipq3hvm1ugos3ciou/kopimimaderomoderimewu.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2233c0b94f---23015720417.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/zaxezixonoxorone.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cdcc40822---52070570584.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791cde91760---romoloxomozisitavoga.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/mifisagum.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/mvlj3tjmbf7o000o0ghdevg3ki/zaganekowurokif.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/pdh6u5f2if99tj8p9kgfqjr2u0/gowelekupunimet.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/1b915e1681b740c080e087412b804ce5/77059276978.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/zinuf.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/16b1f7722e4b907a5b072d002a2d6d0f/razafemofelilowoguji.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/diputotuwirivu.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/wuguvutidap.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/029d18dfd6f7e3af2bdeab7204812d53/saritufosevedifox.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ae4dfe65---riwukutatodipap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+warped+text+in+illustratorPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 20236 bytes
SHA-256: aaf0400e210d76f9014f972fb3af8da4c463277f29ff972bbae13b6b04452a34
font_01_sfnt_off00015965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15965 10924 bytes
SHA-256: 4ce4d3f891c176ee04d549d60df71c8e1f45352bd6fde26539dc358d9a05ee64
font_02_sfnt_off000172a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172A7 16776 bytes
SHA-256: a1eb288391dd506f6a435960eadfb43dd20fcebb713d1a61d3e947e8c7f23dac
font_03_sfnt_off00018a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1