Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c378e2b85d3b0f9…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 01:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f1e3dc84a0512f707f81224f8897ddde SHA-1: 1f7fb3a0125d43e2438bc9b56b15e520ca3ab5da SHA-256: 7c378e2b85d3b0f9f2a71bb3a08e715993870de644f1751266ef5cb1de8c17a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malicious redirection scheme. It contains numerous external URIs, many of which point to compromised WordPress uploads or disposable hosting, suggesting an attempt to obscure the final destination. The presence of embedded JavaScript, flagged by heuristics, further indicates potential malicious activity, likely for redirection or exploitation. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pcparts.fr/ckfinder/userfiles/files/24651186152.pdf In PDF document text
    • http://greatnice.club/updatefiles/file/38063200196.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/sibezotis.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d77533d52e---dubuxibadelovovasati.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9130d312c---jobebefawase.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/belebonebabezag.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/90962826389.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4972f41a477f2e526a515d4954411d07/68063238470.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bc821baf2---42912191208.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/39mjcsabsdi3il1k7ij7f3kddd/xasona.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/wajefuwewulasawi.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/99306771965.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/kufulobawoxesowarav.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/97960348946.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/tedex.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/h6qlfi5unj5nh70p4aoit0lrt9/pimeguse.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/66871939627.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/96877185276.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/63182936831.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/tonubuzikekugo.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/a2s72no2bib0nb9dboddt0v9sp/90988375368.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/207592968560cd1ea609e07.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021613114317746.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d90945d4e0---tetesukefupumabibizeg.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/sugugisa.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/fmefmfhhgmfk2vlaj3rod3h6eo/98277383345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=jazz+guitar+books+pdf+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC012 11140 bytes
SHA-256: 8ad298c1d18427c724795fa1d7dbc9b19356d381d9dfe4fc29dbef29721ff91d
font_01_sfnt_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 18836 bytes
SHA-256: ef8e6190eb263ca981be1b491a7cb8a45dab340fc2ee9c762a425a2dc019eeb5
font_02_sfnt_off0001092f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1