Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce12b72cbe4687f…

MALICIOUS

PDF

274.9 KB Created: 2021-07-05 05:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 071988b98cdb672291f401d20c6d4813 SHA-1: dce85a6a52b9c59abb1797e741c8cc1321236841 SHA-256: 9ce12b72cbe4687f86762b9da3202050c044a37173f953de55215e9ada668cc4
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains multiple links to external websites, including one identified as a compromised WordPress upload storage and another acting as an SEO redirector for phishing. These links are likely intended to lead the user to malicious or phishing sites, potentially for credential harvesting or to download further payloads. No scripts were extracted from this sample, but the presence of external links and the nature of the heuristic firings strongly suggest a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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=give+respect+get+respect+essay PDF link annotation
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d15543215ef0c57a74cb3983c2fcb21a/lunibepewewedajitubalopux.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ii8a3ksthdj01h4qujepc0ns4g/43267144382.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/49047336588.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160775610e1879---batotisowugume.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/gnug8kj8a5as1vo2fni92cp1u4/23161868101.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945e9786d39---49081266585.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/87025543455.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/81150504253.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ksqt274nvakc11rkgdhmvtbh76/dilexeraradovo.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e002b9fc03349a923746abac7b4c6225/vopepidepeselanedojapo.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/mojekopujuvapis.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c34a7c315---loruxabapesugovotivika.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085244d8d3bb---90245206462.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/xudezuzebabefuloxa.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c9789106---77164197769.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/j1j3lqn9ceq2hrddnsh1vrbgd1/juripi.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/912f75d4470ce605d754e7240597e83e/48798664383.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/gemexil.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/mqunajvnvfin8resjfj9bieoqk/zubogol.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/4362f754afbd608708b88251e03f7181/zenuvabakozavuxe.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/8758559487.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/9910331860987632b842c.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021061214244355.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_off0003d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D70C 20216 bytes
SHA-256: 240d2ca7430a7e158508b4828261b5b4adc19ba84041c368d6b7725f959b36b2
font_01_sfnt_off00040b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40B3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00042353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42353 10500 bytes
SHA-256: 4a9e682752583ef5a8d6a40705b4a819770dea78eca97878b1360f675cce9eec

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