Malicious PDF — malware analysis report

Static analysis result for SHA-256 c392f04dcd33fc94…

MALICIOUS

PDF

92.0 KB Created: 2021-07-14 04:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: eafa567d6b36d1c26616686cfd6fdef9 SHA-1: 491af9c119a2d174d544952d2cd4ffeccd5a720b SHA-256: c392f04dcd33fc9431795f2455798df4a341ea2472243389ec049d31ee43c05b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites acting as hosting for other PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a link farm on disposable hosting and compromised CMS upload directories further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/uh21kq820sk4o1v3lsb52ksgh7/xoxodepufuni.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945aac8eed7---86070004881.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/806731fb5b120abee194e10cc389fac4/mivavefi.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/53346700572.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/34100858668.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/0480869b14f5bd7d37f7bc751434dc0e/86951544645.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/c36kvpp519ia6rf3sdgf5a1706/lofubafud.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160831641ca395---xezed.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/99241736722.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/50878983773.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/27382070103.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc101ee604---ketevavufafivunubavume.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0cacf590bfcb9bb6b06f38a7a7bd7b4e/siwoxakododogedovafopofe.pdfIn PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/tebotezejefosoxugufuve.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/0anj91pplnnolruurhiuqp4tb7/41962526734.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/vijupesabetijulipa.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160733f0388f5e---lowerina.pdfIn PDF document text
    • https://kenadong.com/contents//files/84558610211.pdfIn PDF document text
    • http://xycrusher.com/d/files/78401817162.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/6343e2aeed807e7c299b97b71f180144/966884976.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/mafuvigefemabutatitaf.pdfIn PDF document text
    • http://954move.com/clients/4890/File/30556082997.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0ve2ptg6mgpqrrqdjktuga8h51/10414467340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+do+name+tag+in+minecraftPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 10684 bytes
SHA-256: 45e3b0e5e62e7596d8a58ea7be7dda3804a8d33aecb7cc94c7e460f795d292a3
font_01_sfnt_off00011870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 19136 bytes
SHA-256: 2b32bfcad2080530c5ce27d41cfee66fd958f08671335cf00e6f658185f5040b
font_02_sfnt_off00014941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.