Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fcf55e61deb434…

MALICIOUS

PDF

86.9 KB Created: 2021-07-20 02:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 38366ec4afad6570ee862a486cba62f7 SHA-1: d86c7bda84dd93f812fa3cc152929e95ece84f1a SHA-256: 29fcf55e61deb43498688ac28ec8ce95d9df1b07b66f2260abf652a676c073a9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging the 'link farm' technique to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b429b309660---54456220471.pdf In PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/28ce4311c103a70c77493db25f3caf0c/siwoxeborifosatikoweduf.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16091e888936b6---7941041380.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/logowixodororemunedo.pdfIn PDF document text
    • https://tantecoccole016.it/file/24322156795.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/00461943f2834554004ccc8efb06a683/93459073722.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/vakaveruvavarixesu.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/qi8nlsjvarbfpcbjbt00cdrt2p/16176694655.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/383ecdb0873acd9cae04333d2747005e/27976190145.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/turilemodadevo.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/7oah4fq0q6s1bnel7h2dm271dv/musovusi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a33e823aaf8---67663996147.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a68940a0f196ca3bfdf3d5db467bd1ec/55472445203.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba522f4a1---pixosonedesoxa.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/jifivoluxidin.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/48997513569.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/lupibudusebixisevewulo.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/76211670502.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/dmntb1b4f8jtu31h0l0pnuunid/29051918489.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/31u3nikifhdfapv2a2gfgcct90/mitutasonaxuranaf.pdfIn PDF document text
    • http://fitviewer.biz/files/file/29476014702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=swollen+stomach+and+painPDF 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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 10840 bytes
SHA-256: eb7f1d313bd1f04ac5efcc199c31af1629d87b6db8808212ebe2c44b727659d6
font_02_sfnt_off000121d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 16652 bytes
SHA-256: 9e21acbb4acc388c23d4648fba3b4f740edd7a02ee7feff9e83c7a4554c7aeb4

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