Malicious PDF — malware analysis report

Static analysis result for SHA-256 983afa130193d6ab…

MALICIOUS

PDF

68.3 KB Created: 2021-09-26 00:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6131331d3237d042de7ea2e5f7e421e SHA-1: 6a441c03245f07262f225e71c2013a7b77e97aeb SHA-256: 983afa130193d6aba8dc9eb10c350e8d3236a07994fb0b9a5b6f83ac4b1db876
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://catamma.ru/uplcv?utm_term=cinema+hd+v2+install PDF link annotation
    • http://polletnv.be/uploads/files/55398951656.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/jtr49uvgkmt3eh4icl51edqev3/laxorifatumin.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/bokuvexefanemosaba.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/buwoxofosixapiza.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/kejoluzisigavuxosobelen.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/22362080457.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/13795473059.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/29324538161.pdfIn PDF document text
    • http://108shiva.com/userfiles/file/In PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/lazid.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/sudidesi.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/80795021753.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/govebata.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/80267132571.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/99414458757.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/sitamusatudeximukava.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/xenolibu.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/tizazufakumosagenudaw.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109041054312196.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a2b19d154---sonasexaj.pdfIn PDF document text
    • https://telenovella-bg.com/files/xuboganifijajafoxoriju.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/66557764382.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/xozoxopum.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/mujipelavi.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_off0000af31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 14828 bytes
SHA-256: b4325545ebcb738e960e19f4972b1ba74c0dd40abc4604989c0fd69386980fc9
font_02_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 10508 bytes
SHA-256: 1eb1fcb7d41fa270edc7d604418c70f8aa4cd3c1fc22728c2e911377d0e6fb8e

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