Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a94ab09b9734a95…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 09:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3b0d94e173daf0b4a5f4911cecf005e2 SHA-1: 286cc22eabed1f22d5670ed57e0e90ba4a74f097 SHA-256: 9a94ab09b9734a95990973340f04d73a294ea279889879bd5bcb179eee23b105
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a lure to phishing or malware distribution sites. The PDF structure and embedded URIs point towards an attack pattern involving spearphishing attachments, where the document itself directs the user to malicious content.

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://chcial.ru/uplcv?utm_term=damon+ps2+god+of+war PDF link annotation
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/14199b3a586c729917e9684d35308444/logov.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/kanufuk.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/35656147305.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/xizunale.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/fumikuzupomunanejegulog.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/oa04iiell1u4gla0jq4tkaib95/tomudusokuketewewojepane.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/69432647780.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/noboniwasepaxajemawefobu.pdfIn PDF document text
    • http://anton-joyeros.shopcloud.es/ckfinder/userfiles/files/77252725531.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/49569422919.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/23749310205.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/jarokibos.pdfIn PDF document text
    • https://festacontinua.it/public/file/gufugisuromuwa.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/37782558682.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/lapamavebifuduzigozu.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904173551161397.pdfIn PDF document text
    • https://melz-feu.ru/upload/nonekozofojabasijizigileb.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zexededinewavudenimora.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/54142332982.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/88556355631.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/13801147477.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///99663171393.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/dosenuwewano.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210906203451.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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 17100 bytes
SHA-256: daa6db7700df505639e5e9e98f66b1ac5910c3d4162560aeb9e40d2dff243646
font_02_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 10680 bytes
SHA-256: 1a7df47aa0caaa2ebf47edc2cf1e478f2f7ced05e0708b815372ddc7ab3b8ef9

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