Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d5d7760a4f20d1…

MALICIOUS

PDF

70.1 KB Created: 2021-09-08 20:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bdcae7028516d02804a028b8627b7b4b SHA-1: e3cb34b2f037804797e5078bb4855b657f50af0b SHA-256: d1d5d7760a4f20d1c30b33f88ee8c859e2c4db998c38bd07bb8bfe8ccb802684
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely intended to lead the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://wastran.ru/uplcv?utm_term=ahs+heartworm+treatment+protocol+pdf PDF link annotation
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/40976882117.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/fejopobizenugaju.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/begidipap.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109020231032994.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fubirifakepanarawuze.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/49512491435.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/13339853787.pdfIn PDF document text
    • http://micruts.org/userfiles/file/44101899309.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/48198014872.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/96829181899.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/dedulewu.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/92563821346.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/13951644681.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/45030205302.pdfIn PDF document text
    • https://inks.bg/userfiles/file/20115453119.pdfIn PDF document text
    • http://katachizu.com/img/news/files/21833912077.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210903230100_cmx7fv.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/repipuzesubo.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/pizogogixulomoxu.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_off0000b0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C5 10860 bytes
SHA-256: dce15c070e27edb072695c3831893add38cabcbb1fb6b16d0ab152bc4ecf666c
font_02_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 16220 bytes
SHA-256: 10e12d2ebf90c66a8a89c0652cf986471373f0c5e43765d868b2b84d9171cb45

Open this report in the interactive analyzer, or submit your own file for analysis.