Malicious PDF — malware analysis report

Static analysis result for SHA-256 0415ee3f958282d9…

MALICIOUS

PDF

72.3 KB Created: 2021-09-06 12:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d9a0f861c96d4778e620f6286441f315 SHA-1: 86014aa97b12ed458856da3798ca4f7235a09402 SHA-256: 0415ee3f958282d9dfc1a99972c699b293f1ddfc2ea8429f7322229384b8ef09
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure, with numerous embedded URIs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=car+wash+company+business+plan+pdf PDF link annotation
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d41fbbf17---59923772799.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/9uc5f5rut7o4m516lv6nkehj46/lelafimizejifo.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/86268913422.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ji9fpiv9hkjlhjvlagdbej7us5/51237999617.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/kaxibobipetixijebojulazik.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/29865119316.pdfPDF link annotation
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/zubiretoboda.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/doboj.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ub9n51papiup4gc9gvd23gjkuh/daliwebewafamisis.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/duvakisifojufaguze.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/jezoxirewizono.pdfIn PDF document text
    • https://parfumzone.ro/files/file/gifapekore.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16124a08907941---zewugo.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/84016031875.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/91494593438.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/202334d5111ea48db7c766d0cced4a37/jawomezejoji.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acc70e68d9b---1046483107.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/tidirenafipawijij.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/vidojusurufunowexe.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/dejagovixefa.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c6bui79f6ibjt4f6g5qjqbcp1/39900776469.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/5088201406.pdfIn PDF document text
    • http://beiks.info/public/file/38314355592.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210607195704.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_off0000b8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F8 15840 bytes
SHA-256: c1380f78c8173437dada8e0de000a53868f66c2686dbe3898289167394f39ca1
font_01_sfnt_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 11256 bytes
SHA-256: 0a2daa8cfe3eb91ee630d99220e98870dda9bd43c24aa65cea4f4121cecedb75
font_02_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1