Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaedf52c6168891…

MALICIOUS

PDF

72.8 KB Created: 2021-09-14 10:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: efc0ce50904df6a76eac7c464522f60a SHA-1: 271b12b258c2f670c3220fadfe3c0543a9b31ae3 SHA-256: fbaedf52c6168891f5032e096c90cbb6ba7a142e3932d9c905a0ae910968ecaa
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. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a deliberate attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m03jbi5gtj86p3g8np4lpa2blf/xexiximemugu.pdf In PDF document text
    • https://strongpointmarketing.net/userfiles/file/65149639628.pdfIn PDF document text
    • https://tcremich.lu/files/files/tunipobiva.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/46165754204.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/fevizazipudagipe.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/jonitifanotafixosunoduwig.pdfIn PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/tizamewetubur.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/56650031622.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/zuzumobajatunepew.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/56412963266.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/duxulu.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/gujevugufemizu.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3egn8cpl2lo88u0pioduqeu8g5/90600669862.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/17846054377.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/25735611277.pdfIn PDF document text
    • https://pokereshop.cz/data/file/99864032275.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/57097988129.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/jotedigikedovuti.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/79145418780.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/62028150649.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/6722618204.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/tevofazaxofojogaxoni.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/bifujupasofadulesezedim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=galaxy+s20+plus+teardownPDF link annotation
    • 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_off0000b9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EA 16056 bytes
SHA-256: 9b93a2df57dfdc0aca7ed8096b3e09f47ee3bbb0f15b0381f469837bf697ccc8
font_01_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 10976 bytes
SHA-256: e44fe72f29372955c4d2c3fa3ae6c2f899c5d6438a2d980383ec4bd50b46f53e

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