Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece06f5474afd28c…

MALICIOUS

PDF

102.9 KB Created: 2021-07-29 22:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1293f95965bc88717388e451520aaecf SHA-1: 04785df77e9a1dc8939edb0c66026fac5d584e41 SHA-256: ece06f5474afd28ce20af9556bd87943158a54b1e28f4776ea8ca56e0ef01af1
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. While no scripts were extracted, the structure and URL patterns suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee187e055---31892981205.pdf In PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3e23a35248---pudetur.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6ae09c85bd2be569bf940bf48b73250/41794808424.pdfIn PDF document text
    • http://drtamerturan.com/file/tuburureraxe.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/46696650245.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/41c02415739ec4cd9bdbcefd7b061c3d/70496846465.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/motenogapew.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/733fe7d7dbfa4f5f81285adb35cca88a/13444086502.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/6cc426355c56b284cbdab23df04cb24a/91818110650.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-28/20210628180931218708.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/gauoucb48bmnakcltb0haki2po/xofoxoj.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/5580021246.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b13d7f5c---89998816991.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210617202115_l58llo.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/tejirijiwedafidurowu.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/44255517036.pdfIn PDF document text
    • http://jar-ted.pl/file/dilob.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/pifeliwapagajired.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/99300387434.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160dda54bc5df6---bagelukobug.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d34173079ab---73245253230.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/577d7076de1cfe73646095695c53a2a4/lagosularatodotazibebi.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16086e62ba3722---gowovivi.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/ce965fb8ba0181e1da7f48d743de5f77/1746370667.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/pegidinexeber.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd1ed8f9cb---kukunu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073baca50d06---zurowaripeliluwoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+find+moles+ideal+gas+lawPDF 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_off00012bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 10676 bytes
SHA-256: 733ed2ca2b7790d20e3eaa234b0409bc65468b3fe57de2a237c74b86ed7c6443
font_01_sfnt_off0001442a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442A 18380 bytes
SHA-256: f942b9dd66b8caa0f07c7952656d937345b79f1720dccabeca3b1c6d0044935c
font_02_sfnt_off00017532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1