Malicious PDF — malware analysis report

Static analysis result for SHA-256 1567937d93a3a257…

MALICIOUS

PDF

85.6 KB Created: 2021-07-17 18:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7799fd07764390544a0afe93badc1516 SHA-1: a3169f63551838f85d0a6f06456679a3e534123f SHA-256: 1567937d93a3a2574b90faf685226c0f47232d9935f1e94aba2ec8c196c1bbfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an effort to obscure the true malicious destination. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous external links strongly implies a redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://go2germany.ru/files/file/wugugujajesizu.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4254fa528e---10204063063.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/38529003494.pdfIn PDF document text
    • http://hhtaitung.com/CKEdit/upload/files/70442649094.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/a8919e1bc7c59d0172dd78de56d701e3/98479254596.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/10311613494.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1ecc4ad0---zetifanavuwadetupa.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/86424701650.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/ea451dd7185c4a3800c778e08f7ee5ee/weteregemupu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160837d4cb74cc---91741212260.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/2fd8a5bbd01027b7e0a753baa641ca50/85610546572.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/49021931932.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/bezefipivajovap.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0538bbe3fa---43652196439.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/18ba4e28a7d53b4cd0e03081c7524697/nolimume.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/78173288579.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6c373c5858a1739939c768d00d368531/dubegakolorodilipireta.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/58763605180.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rizanijamovorerebugi.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/55276711306.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607218928f462---50720472808.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/wawiwewimimimoru.pdfIn PDF document text
    • http://arablift.net/userfiles/file/17701045742.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/zekatasetonekafuzit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=justice+league+animated+watchPDF 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_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 18200 bytes
SHA-256: 73493cf3b852dc391025f4e15e2519ac4a09f5b9f54c777c14bf9a932e6edf54
font_01_sfnt_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 10772 bytes
SHA-256: 79f52a44e4331305c34892abd2898f6c1a40b10b09800af3927d0a8914e78f34
font_02_sfnt_off0001314e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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