Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6a16f7407a144f…

MALICIOUS

PDF

93.0 KB Created: 2021-09-06 18:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a62c5edca30fba6ede9c521f25b1a74e SHA-1: 3922c4b782773108b3ae9c2e60acec21f675d606 SHA-256: 8e6a16f7407a144f03e28fb557bde2c7c70b3abaa458aefcfc890a852b93240b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests an attempt to lure users to external, potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904bfa7d40d---54185053806.pdf In PDF document text
    • https://aimara-bg.com/userfiles/file/xurepifomuvuna.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee2a7a6520---11373568316.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/84bc1e961a085120622aafa37480ee3d/muwirasojavazegomatu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/f4a15inelvu6kf6hbuudncdlf1/10089241100.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073c722025e0---62953818075.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a30fa87201e---foxunane.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4f7ce8135---13398132907.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c76b1ebb90---50371134409.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/xesisodojupukox.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/97963596574.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/bogagewaronoruj.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/47717167078.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ceb7af4dc---31307398926.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/50882735912.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/34929097368.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1651acdb6---50047798711.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4aa640e15d8570e6f21d5f44a39fbe2a/84617498096.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/wakafirajokok.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/91d1bb1b2a46ebb0c8c12bbfca1fd50e/bujevogomevexunuvu.pdfIn PDF document text
    • http://endemic-capital.ru/uploads/files/60139390284.pdfIn PDF document text
    • http://fittbikese.hu/files/file/ditupomebekeled.pdfIn PDF document text
    • http://maihome.hu/admin1/file/89791805793.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/31ddb3d7de79bcc22e498a389fc0b29d/80220095824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=main+features+of+romanticism+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_01_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 17220 bytes
SHA-256: 1162cf0174f54bc4c7a49b9c824a7e603664fc79ee3c30577cabdafdc1375b49
font_02_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 10828 bytes
SHA-256: b99852da126b38cc6fbb72137a52756939c0e769ac2b61de5a39e0c7266f351a
font_03_sfnt_off00014db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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