Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca09149d8cbfc923…

MALICIOUS

PDF

69.9 KB Created: 2021-09-22 17:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 45fdcbff3e9f268664a2d963f69ca2a3 SHA-1: 1abdba56f14eefa81130e446b28da0ca4b9cf1e5 SHA-256: ca09149d8cbfc923cb126de97c4b1ce8e72527c828ae39dff29794267c17af2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://elpollopaulino.com/cenavarra_userfiles/files/46842957490.pdf In PDF document text
    • http://proficlim.ru/public/userfiles/file/merezaworudonuluvow.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/2304956565.pdfIn PDF document text
    • https://hgb.se/filer/file/79582928478.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/gefaminelibobixi.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a274db79c6---lisirunojefobemelusego.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/30564290877.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/kafex.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/85532553288.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aab3e41146---dojagunezepul.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/32180026465.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fn2iup2tmfrp6p1s77pe8farn/werotiwozatupivuvatusov.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/bebakitojabedin.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c7d53dbcb---gajosijeburigagojebujux.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/10729838815.pdfIn PDF document text
    • https://vitanov.rs/files/10016084125.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/in7p2pbqfktm9ck7gh6qmc24t2/65879184955.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5fc3625b8827727096de04efb670e4c2/duzigivanuborabuve.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/radisodokebovotofibivu.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134f3c4d6de3---63358044836.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/55244325105.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/16921876556.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/vofebuxidoninisezar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=yoshi%27s+island+super+mario+advance+3+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_off0000b151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB151 11120 bytes
SHA-256: 82e13663756d2ee42cbc10a3b4513bf053d9b0c4407d56bac04c036199353704
font_01_sfnt_off0000cb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 15236 bytes
SHA-256: 8ed6372a1a9353a17b01ae1fe530604805a6f7775aee33024eb74b1b08da4014

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