Malicious PDF — malware analysis report

Static analysis result for SHA-256 562ea00cbcc1dc7b…

MALICIOUS

PDF

80.8 KB Created: 2021-09-12 22:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a6a8512be31d8899350512b2b13ebe8 SHA-1: 385b4c1404c853ffec99160cb7de0b3b0c093757 SHA-256: 562ea00cbcc1dc7b25f8c1a093141a2e103a22dfd8c59739433967b4820eb60f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly implies an attempt to exploit users through redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=spc+world+apps PDF link annotation
    • http://chenruichem.com/upload/files/bupijexuputefi.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/94832019269.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/71873957881.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/20576116525.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/6653755053.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/fe9a4ef9cb63f8763a3c967c9e3fbc1d/38418683191.pdfIn PDF document text
    • https://mashura.co/userfiles/files/97958854604.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/19128465528.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/nofejogol.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/xikomojovuwajuzigaj.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/rozukageketefotikonu.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/bizukowifudejewodubi.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/jikit.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/29803155210.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/11936796880.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/xavizesolagofowopegitag.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/razuvituxixazudosototuk.pdfIn PDF document text
    • https://atlantidegattico.it/file/fudugazawug.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/44158673496.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/vuluvunozarakebifovine.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/86206141880.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/74730377232.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210905050424.pdfIn PDF document text
    • http://elezioni2014.gds.it/userfiles/file/zogus.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_off0000d865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 10244 bytes
SHA-256: 00e847d68b57373a47b76c9640486153a7442e8d9290df43538f82ceded32285
font_02_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 17736 bytes
SHA-256: 1d85006507ed4403a17e974c534877dcd7d025ff11750e506a1598545fee2136