Malicious PDF — malware analysis report

Static analysis result for SHA-256 029f8e87b182e390…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 13:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6c876a69b7e739402fa2a17bc41f5fc5 SHA-1: fa0e79b8afc1f527eb971aac3f1b5b1029054d0c SHA-256: 029f8e87b182e3904110aa7228b1dc87873dd6c83a6d067e1099f999fc16554b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=heaven+and+hell+huxley+pdf PDF link annotation
    • http://coinproject.com/userfiles/image/file/2644801389.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/26386490955.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/wijolovadafotakifaver.pdfIn PDF document text
    • http://indemo.pl/Image/files/lugajir.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/38647121595.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/39794491649.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/gopiburebunum.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/fiferuwububu.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/xiravawo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/2cb33598c94120646f43bcc699a64108/tapapilorawogomuvoranez.pdfIn PDF document text
    • http://slsnn.ru/content/files/36194854769.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/sasabamewokesu.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/pevarokapi.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/gevelenejusaga.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/91739558352.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210902_C108C0F497ACC2E7.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210917_583C55C1CBA7C716.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/ropisojak.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/87109118726.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/getekimofuvotag.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131d55a1d8da---ribodukidakexigikaz.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/69319011582.pdfIn PDF document text
    • 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_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 10388 bytes
SHA-256: ce0593914fd422f40013a0594a5e42bd31d9c3a7933fd12c13842a37cfdc6edd
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 18448 bytes
SHA-256: a1f2b261b29a7ae1e316b8b76a8bbc4a3c0c9d38b8e8559053d72d2244232ed7

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