Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d477d022139578…

MALICIOUS

PDF

138.8 KB Created: 2021-09-08 06:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc0da84417adebd88ccb94359568ed8a SHA-1: 2d2195e152cd2ece231402b02db9cee42b5d8df2 SHA-256: d0d477d02213957804129b3e72188f17612116aa191109c014deade63863430f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are used to redirect users to potentially compromised hosting, likely to serve further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c2247a72893---61526107006.pdf In PDF document text
    • http://palaciodelosnavas.com/userfiles/file/19481451188.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/16e5e15fd6c619cecef2d30697b4bfae/zofobadezogunigusevawiri.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/18832992242.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/1fb75e5c396df182cda189a1d70308e4/sebibemubiwegumuzexoduf.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/bejajegimugijirubadabepus.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/xuwedilowuxukow.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/34091511362.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/2900799826.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108e422a0e2b---94838439755.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/69486514803.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/11245448142.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/73aff373cca1219e647c24d0d1e1d2e7/94729246764.pdfIn PDF document text
    • http://ccsl.asia/files/nisuvoloj.pdfIn PDF document text
    • http://air-ned.com/uploads/files/duxifoxotoruj.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/domalopakirafuje.pdfIn PDF document text
    • http://ellev.fr/upload/files/kepiji.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6puf4icntvo592r5gt99gffmic/jegatupulelimagowejuz.pdfIn PDF document text
    • https://giustofiori.it/file/43612542170.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d5a098e326ffb6e2da462e245232c216/mimigamijurisafu.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7q44qhk84t4s6294ute52o58b1/disuxuvamexesemek.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/488bcad09aef95d598505b56aae05ea3/futudimex.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160814fb37de7a---26021610298.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/18244670713.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/bitisuxipuxokevizepak.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c483daa38c---94828445336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=prose+poems+khalil+gibran+pdfPDF 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_off0001b0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0BE 11080 bytes
SHA-256: d383870b716dcf69a7fbf95ff90b8641adc3fd7c30b6d155f335fe4de0016f63
font_01_sfnt_off0001c9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9EB 22704 bytes
SHA-256: ca81baead8abad1893738405496ff2576c09fdf3be69b03181e30b8752b85d46
font_02_sfnt_off0002048c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2048C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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