Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9e2641a8cfdd02…

MALICIOUS

PDF

77.0 KB Created: 2021-06-01 10:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4025229ffe40eac408b7e2a30e90bf37 SHA-1: 2ae8e78954654816fe1865a822ea12089ad52832 SHA-256: 0b9e2641a8cfdd024f80cf0ca847048096ce7a17aa9f87edd3a349f15aeaf16c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm pointing to compromised websites, likely to trick users into downloading malicious software disguised as cracked software. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with a high ML score and ClamAV detection, strongly indicates malicious intent. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f95jke660qfqtmnfp9dhqhlbe/3818180139.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfcfee566f---sezenumojaziwomopuzunu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/66fca55a993b01c0d1de1bdfa697f2d3/zerivadarazeluwefajud.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/45200857052.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092b10650de6---50369857351.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/dotozojo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b14d64ee6eb---34230730080.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afd511c3e71---50640857139.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/p9qpolsf4c258ikfkttcq8vqh4/27537193752.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/ce81acad8601949111c70819c7bcca3c/zinopagiwijavetig.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3e4952ab71d02c2453e472c9915c5c9a/sapebuvutosovikodasenuri.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/667957baf1487f14ca51672e96d119d7/zagukef.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/kilekobusam.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/2558699693.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/muruzixedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=download+vmware+workstation+11+64+bit+full+crackPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 5700 bytes
SHA-256: 2e13e014160ab76fad2fe09e485be66ed9ed48dc8464573a2f1b730e8b0a74fe
font_01_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 11132 bytes
SHA-256: 4035db7d4659de59d2fa577984071d2130a676657a97efeadaa63c3afa0da840
font_02_sfnt_off000116d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378