Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9fdaf7fa5edf62…

MALICIOUS

PDF

85.0 KB Created: 2021-09-03 21:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 01dac8c7a668fe056feacc0afe79c4f4 SHA-1: a719a7075179f1c9f0938cfe62026d3f92a6f4b2 SHA-256: 5b9fdaf7fa5edf625ce3bbc61ee7a4ea5e4ed058ddddb3d0fb18f3c88855fea0
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=slime+40022+manual PDF link annotation
    • http://drairtools.com/ckfinder/userfiles/files/99047956818.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/1618661662.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/12119011744.pdfIn PDF document text
    • http://trivio.it/userfiles/files/85686342412.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607194958c202---84767435068.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3347deb14f---xokefiwipa.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/18267393198.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3d7bac5dcb1fea41f172a8d07ca882b9/sabebobeborejadanazux.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/gasuverevagu.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/bobv3o6ogpt50cio2jp4g8e0m5/xituvovowezavula.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e65d826a12---69452741851.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/33182945375.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/20427453755.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/kobunisiroruvo.pdfIn PDF document text
    • https://tonitomov.com/picture/file/47854763194.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/segazu.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/tefimolujuj.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/turililakeworitesi.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/rajafefugitazetesusikawu.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/diwoxuwerov.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4aaa8af288f3711188d65e218331dfda/verexoviduxirutagib.pdfIn PDF document text
    • http://lucann.com/Upload/file/zikopelaf.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_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 17188 bytes
SHA-256: 6cb5462d32fb9f9499399a621a0656cdc8a116a242edd090095a48dd7d6918df
font_01_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 10276 bytes
SHA-256: d83a50ce25b0100617888b35a09b95554c6309e0c2e81ee03cbbc590f33fda1f

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