Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf29dba6936282a9…

MALICIOUS

PDF

78.1 KB Created: 2021-08-27 03:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 626402324635e91431ed36cd07ae4bec SHA-1: c84fe04da4643b41e56b34cf834d50af1c5324ad SHA-256: cf29dba6936282a9c3e1ca0e858607d79b84bfb8c382eaff92eac4aca84a2943
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fresh-cherries.com/ckfinder/userfiles/files/zogid.pdf In PDF document text
    • http://lowchens.org/userfiles/file/10533181650.pdfIn PDF document text
    • http://vaynhe.com/upload/files/wiwapinuf.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/tidapejakovaziwaparutedus.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/gosowotipuzatigizapexo.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/paxate.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70c74bc61---55605880443.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/77f161a59bad8ebf0df10497bdab4e3e/nenaxibatiredinobomiw.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/de898bb2bbe126d591681f1d37c7fd75/86576685826.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/495126960799699610a2854e992e0e5e/zexifedoridipobax.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160989fedd79ed---gagesiwavenitigiduluwu.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/46995141144.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/fodagavusogapiwufibaka.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160efe12f45cb9---bifuzexiravotis.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c29c8b5b1918a0e015a273e8a7908eae/xilanolisidas.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/gejumolewoxefon.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1623914125.pdfIn PDF document text
    • http://fluellentrees.com/clients/58222/File/29813439129.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e022eec36---rowibujajinenulumaw.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161281d58de645---36907255667.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/62422735303.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f9c26a6b2782942b75899c0ad86274ef/913218481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=stream+from+phone+to+firestickPDF 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_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 16408 bytes
SHA-256: c0b853d59b5cf5c7de3f67aae5cfecf7b63455d242a25544aeeef8b8aa165d8f
font_01_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 10864 bytes
SHA-256: 3d9cdb83c29e99a8681c40a71cc241ae1430a29a820c83ba9040c7a15c25b531
font_02_sfnt_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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