Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4c3ab17a06ba5f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-08 10:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 30474d8be044aa5579015ef501bc6769 SHA-1: c7d832ffa12533ca491686cc14bdc988266dceb3 SHA-256: 9e4c3ab17a06ba5f152a4f342ea7f50200c3db279147e669a09664218c35c280
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The document's structure and embedded URLs point towards an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://queure.ru/uplcv?utm_term=human+cell+parts+and+functions+pdf PDF link annotation
    • http://pattarasawat.com/ckfinder/userfiles/files/28245669782.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/giliresirabajilafevet.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/38539685194.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/bivasa.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e68aaf23eb---badufetevuzewezit.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/028243e6b4f1c89d8cfede756a509e3a/xafebedikulotimifoti.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/rilabubome.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/26690325290.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/28001765374.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/9f6fb0211c254c6fa8703ffdc703741e/jugezumure.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/razilomuwilisus.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/854bea94a66243399483ebc009602612/59833664043.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/xirox.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l1duc3eplkh7b64v95darl3np9/fawipavilodesajalegetetuf.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/k2apj7u7la58h785c9403nnnh2/89349223939.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/23367709933.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df4efc3b2c0---goloxexagizaromafilonefof.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/3b1e2ee8c1990997a5cdac52713d56a5/jejunim.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/18718761812.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/46156410844.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/13cpt3bckmtq3j4kv1bv481vkc/9737574215.pdfIn PDF document text
    • https://polytex.de/sites/default/files/wufilabibamugaxu.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/93524608527.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB642 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 10872 bytes
SHA-256: 998add81cae0a46daeba86bd2967332303ddcdb493cc326633afb0b9326fe64b
font_02_sfnt_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 15168 bytes
SHA-256: 3b1ebcc568482f0f3a27b7b7322b2ddc973147a16ef98aae9931df9c367e31da

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