Malicious PDF — malware analysis report

Static analysis result for SHA-256 b573dc33745b02bb…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 04:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3aad49815e0bad028c4ac7a0d039bfed SHA-1: 0a7adcbc046327bbbead0c80597a144dc26b76c4 SHA-256: b573dc33745b02bb5766b660ecb5994bc486de5591111daa31d874aee77fabbc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://irlanc.ru/uplcv?utm_term=truck+games+ios PDF link annotation
    • http://encino.ilovepokebar.com/uploads/files/ditevo.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/faxugaselesefarukupakeji.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/33025051179.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/69151287224.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9860c9e8d---52734292330.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/zowenoboraduvumuzujukemiw.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/82327950797.pdfIn PDF document text
    • http://delve-cr.com/uploads/33002064217.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/dixigi.pdfIn PDF document text
    • http://chinalabware.es/d/files/zivijeg.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/6114ef3d505a4da0ddc6ffda8f3602f8/wakadolofibuxifukij.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/bopejavatibumi.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/kumagijupikom.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/75883323750.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/duzazogonaputofab.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/91272986924.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210912174503.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/sepabiwugibatikoba.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/8547550473.pdfIn PDF document text
    • https://huanghecables.com/d/files/60478874880.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/jivetewet.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/jijuvudojosovifulivuz.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/47515719717.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_off0000b224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB224 10480 bytes
SHA-256: e8f10ed47c51956849f6021e7a904200c78230a7785fd11bda3072a42019fb4d
font_01_sfnt_off0000ca0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 15140 bytes
SHA-256: be4fb7448357f30632000a2ee966a9f075146c88e398027fe6f49640b37644ac

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