Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7d35fbe967b3ed…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 20:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 08c24a4ff2a7e20d2f2610ba5b16b748 SHA-1: 5ad9567ce66506a9540b2c97b7ab3edc8d76df23 SHA-256: bb7d35fbe967b3ed0e7e4e64bd73e92770ed428dcd930b1dafffd8eb85828587
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm with numerous external URIs. The PDF structure and embedded links suggest an attempt to direct users to potentially malicious websites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=8+ball+pool+apk+mob PDF link annotation
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/wubazaxetutixir.pdfIn PDF document text
    • http://liily.jp/upload/file/20210918025238.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/20100527205.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210907223516.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/98646766738.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/28407723596.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/bomelup.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/fudumomiwanituw.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/kepomiw.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109070228141669.pdfIn PDF document text
    • http://perksys.com/userfiles/file/vuxowemeliforawanuto.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/jitovidupofo.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/85269524792.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2912a22f98cb0bf302d02d3055d2cc63/xesuletutafison.pdfIn PDF document text
    • http://intersonik.eu/upload/files/panerelovor.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/xafozirapakezudozu.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/gimanube.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/5v2p4qn1mhmmel8vhg7nalvhhl/91375250545.pdfIn PDF document text
    • http://moretonassets.net/userfiles/3086360299.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/vasapubipakaminofomene.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/15296053962.pdfIn PDF document text
    • http://master-vin.ru/files/file/zedajebajetefevoxitawe.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/94903071913.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_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 10064 bytes
SHA-256: 900f4d0f1baa61dd03aa613b0830c3de9ac0649d483f7db19b65b75e105cbbb2
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 20836 bytes
SHA-256: 1ef4fb9e69b8dff1b5ee5778c4516339d75996650d911bad0ecf1e93f0013f5f
font_02_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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