Malicious PDF — malware analysis report

Static analysis result for SHA-256 2206ced03f40939e…

MALICIOUS

PDF

74.1 KB Created: 2021-09-17 17:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2e18a02d0a3546d9065bcda890c4eff6 SHA-1: 8cf81d03d95f1a66737b31b8aaccce3fa8c97322 SHA-256: 2206ced03f40939e7527497e23cec6d2d72a95542241e2becf57b0aab193c08b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://cisseo.net/userfiles/files/zamoxagoxitulesexulav.pdf In PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612eea8854cc9---vuxujulupiwejafanes.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/2450135716.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/67544071247.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/roruxez.pdfIn PDF document text
    • http://mobitransjogja.com/files/35944514359.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/93748523694.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/piwope.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/duzoroxu.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a17f64a5a---20641533850.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/62356488442.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/namubixiv.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/naviwuzexire.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/cba0a7ade41e40dd3416653233bb5bd6/togugovatufeteduni.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/1192603379.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/tapez.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210906_045858.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1630454873.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/pimadeguz.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/zanupukonunevexasod.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/32291392867.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/8624175626.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3c47c5dc89fb8133572235ac15fb2337/97483427113.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613954f924546---96227844049.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/82422537270.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/15185117086.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/86985302568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mi+tv+stick+web+browserPDF 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_off0000c192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC192 16236 bytes
SHA-256: 4b8097dcf0a9816828f10a271f3c13b59a50d5202c47e9f6e852b04193ca4ca0
font_01_sfnt_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 10288 bytes
SHA-256: 2acfe3ec9d940277aa1c99639ecddf5457d7b927809667ea90fb4d78e241d988