Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9debccf0290ad2…

MALICIOUS

PDF

84.0 KB Created: 2021-07-03 15:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 59c24bb1882116025dad90e4fd8a4318 SHA-1: 1b11696ca273b0b7ae2509605841579f26dfc470 SHA-256: 3e9debccf0290ad286689958328012582e97c33415085cb11029731e5695ad78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ketchas.ru/uplcv?utm_term=iso+14001+standard+free+download+pdf PDF link annotation
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/cfsq7a2ij52na8b02ns3ge9eg7/nujedepenipilokawororukub.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/76287406615.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/45731935886.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cee89c384c151b1c72dc7050b52ecb35/73258984653.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/zubojesijoragomivade.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/41123585491.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210625155144518746smdg1g.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b87630940b1---32882820924.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/221136c67e6e7d6b1c4d2b652105d0c8/71184814919.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/5cfffde822a2e93427d2620ff26e1f71/82547379669.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb5488142---jomajobefudat.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6784cb2a---xezododibede.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/lufataw.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/lijegimujebavamimoni.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/eb3818ccfaa4c95810f7c6aadcd41e3f/85237842009.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/29917881618.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1f2370e922b8b58bd5f95cece407dab0/34594776560.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c33f0199---jozunotezanesomivagibax.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/724ece4d1244cb46b0d3ca87e0e959bc/94254586434.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/gt5f3vi9i192g98b9r08birmrh/bugeredoratapodeveforep.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/moxogitegejomupitilazatog.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/0ec8405283070201d49a48506cf3e8ec/suzokatumasiwumo.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 10688 bytes
SHA-256: 2c209ba9fefe6754cfb369d92c894923c95b2750b750005e99acfe7f9a3f5e2e
font_01_sfnt_off0000fef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11706 16996 bytes
SHA-256: 1163404603524a3b63aa9c116e8acb7002df77e234918e1ca98d2b286945582d

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