Malicious PDF — malware analysis report

Static analysis result for SHA-256 f029d5ace59d80f6…

MALICIOUS

PDF

77.8 KB Created: 2021-06-23 12:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b03a233d4205bfd7a084af375e9f58bd SHA-1: 8db656acb0748f3ab0f5df8fcf75dec64c825a26 SHA-256: f029d5ace59d80f665751b16e1ba38ff58691087e7f47502a3976029318fedba
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads or redirect users to phishing pages. The embedded URLs and the heuristic firings suggest an attempt to trick users into downloading software, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://firegallery.ru/img/upload/7772715607.pdf In PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a7b75436ab52ad6c5d08f59256ee01a6/fikirixozugasovijemenewe.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737864a2f6e---daxarufo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ttfdm8def1prn52f0sbfd5phk0/17568907226.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3f2cbe32---gojekesisebaludupakedu.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/tosuxabexujawuzinosisefe.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/87250843230.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/fokakerafuza.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ffjjkg42aa1p08ou4ges8cdk4e/63135142633.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608a12e4e6ff0---3114399182.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/84002039491.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/do53fmgjjeemcjbb0rjvlfh11s/27695138629.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cd866421c31bf8dadcd447fbe5fe273d/36283087688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+minecraft+java+free+for+pcPDF 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
    • 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_off0000dd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 5348 bytes
SHA-256: f7903d135c8fb51686c184a91c42536005a18e32c7330d0790b2b57fbb8f22f8
font_01_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 10904 bytes
SHA-256: 8b93bd13d9e1370b8e0df4872514c34046b27081c88476b31a0c499534c04142
font_02_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 16088 bytes
SHA-256: 67bcfb7c388726f5c3b45134396d4daeb52989b52d679508e6f393a01196499c