Malicious PDF — malware analysis report

Static analysis result for SHA-256 2080c9e836343ffd…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 18:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 65828b0985eb6d8e390916d646430a3d SHA-1: 6bc8609dd73ad7c1303c22e7e2e01ba2525acf57 SHA-256: 2080c9e836343ffd0f721351daced33e584095f26be1b8a119b7bddfdfd0088d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm and the detection as a 'Phishing.Trojan' suggest it may exploit PDF vulnerabilities or lead to further malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://cncforginghammer.com/d/files/fugagutazigit.pdf In PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb0fad8e2---87654082445.pdfIn PDF document text
    • https://dineflon.com//files/4958531460.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/89792751834.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/xetekumiwokip.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6aea7d8c80c7ad128aef89b9be71150a/48990883974.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee50a991977---zumobojozujefesetexeral.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2476765df3a11e7e24436e2ece739652/44735641775.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/32449692443.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610033b38ca5d---97577602575.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb14a62980---33393169304.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b7069b2b---gelaluw.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0632892f1793e74ca6f6914bcad40ea5/kizuwaxojuratazuxo.pdfIn PDF document text
    • https://shopabrang.com/images/files/zokapetis.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e3dadf8fc5c9b15115c8856981622ff4/kofokapixuso.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/kinisejevisemukifojuli.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/dirabotemomu.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/10346113980.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/94aa6b732c0602d8e01051e6104a0519/nabokukeridaxoma.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/40329081520.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/nutosoxixigabiwowadov.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ecd227cc6---65129253211.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c661a67689---62832692498.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f6ffce93d0---gegiwotigitaxujenozipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=context+in+pragmatics+pdfPDF 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_off0000de4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 16864 bytes
SHA-256: dee8adfac566ed370c97fda44160b42395761f698a37d247d84d3d3f97ad335e
font_01_sfnt_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BF 11052 bytes
SHA-256: 4440c2007435e9744d8be620107db0552ce26e3bed63e9d503292082cddfa32c

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