Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6740747284853f8…

MALICIOUS

PDF

77.7 KB Created: 2021-09-26 01:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: dfaf635abde1ec8409323a7d6d293a72 SHA-1: 2cf2995b2794b6bd846331cd99eddd07b7ad7849 SHA-256: e6740747284853f86f18a520b812fff4c09dd88248e2f146339e8050feb00433
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, suggesting a link farm or redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this PDF is part of a scheme to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/u74ta5qa7fca63q7g3qvqm8791/defozaras.pdf In PDF document text
    • http://schokobrunnen.com/idata/zidototo.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/9178185622.pdfIn PDF document text
    • https://hobbypet.cz/files/file/mobemojewazapikilorazef.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210901091335.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/pasuruputilomopubesupuz.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/74960462584.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210924120058941559.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18928867672.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/jodikesuvajuwanigizi.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/zolakipiwinixewu.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/watinupopefilufedokugadav.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/58321127796.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/belaguwomipojuxadiz.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021091107501773499.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/kibifiwiwol.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/14416782659.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/juxajibelevipenodep.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/wutiwifobuzatu.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/wuripetuparolemulamok.pdfIn PDF document text
    • http://webbuilders.com/files/file/kidoxifijinufilironupin.pdfIn PDF document text
    • https://maturana.cl/upload/file/82880318530.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/1567154480.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/2e13b119df4e6619a05ea2890df57840/guxakamasisojad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=chronicles+of+a+death+foretold+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_off0000c390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC390 10748 bytes
SHA-256: 38f711c341a16dd067189782db6ec41e5e26e24085383ac3d8bfd8aa1744973b
font_01_sfnt_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 19952 bytes
SHA-256: 6010c555bfdeca770111d83a8c40dced0decb8509573fa0214927db455b8001e
font_02_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1