Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4be4663ef47740…

MALICIOUS

PDF

105.8 KB Created: 2021-07-13 16:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3ad3564101246c18cc8f6153d809d7f5 SHA-1: bed3a01de7d68a1b0eca92575036c70c4e3a7e31 SHA-256: 9c4be4663ef47740721a6c68d2e2164df1971313b7857ca1863405ca557d0bc4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting an attempt to leverage these sites for malicious distribution or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond its structure as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://malopolskiszlakwinny.pl/upload/File/98495887821.pdf In PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/42678664830.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609892021fc6b---todabiwebumajebisejegaj.pdfIn PDF document text
    • https://biocoils.com/img/file/72742650419.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dda3d7eff60---tubutiwudetejedifibami.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/58221866018.pdfIn PDF document text
    • https://cape-electronics.com/media/file/32295073716.pdfIn PDF document text
    • http://prmakeup.com/Image/files/tuvita.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/0b9e5b3c0f5fdf48199543e3e3ca675a/guvagusir.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2b9a7431560634caf219504def51d8e4/takexifozilozidegakol.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c16b050db25047be576b3ddc6a9f3158/10200678549.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606c758d06e54---13671096855.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54b873b85---vebosemevelujowaxufe.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/gaxudidugibezuxezoloz.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/98b43029b01df9c5a72647a0453f4557/3108222708.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/nfhld18k81u96fgscu4c1pgesg/13931541473.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/17pu9nlm5chhj63c0gu3kl4hl5/jinebutijokoloxe.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/78852093913.pdfIn PDF document text
    • http://hhtaitung.com/CKEdit/upload/files/75036271096.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b821098c421---22436099406.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/94b837152d8cf9a8d082af6061c73d33/xulikirezijakupo.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c432eb8aafa---57969616337.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/677c0cefc00c3993b15d47341c70d4d1/77831293509.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a518953a6cb39e737879f08ae09fe56d/35585615308.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28922e67a1---10754056696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wrong+direction+fallacyPDF 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

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_off00013ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB4 17780 bytes
SHA-256: 1a1304fe875371ebfd7216d18cb0706a67124a9dca346b0cadaaf361ba19abdf
font_01_sfnt_off00016985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16985 10592 bytes
SHA-256: 18dbf65e678cfb1df00d71793644a7af9453251c80eb84919c429db5cb73a78b
font_02_sfnt_off000181a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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