Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b064846752a646a…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 03:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 631280205ae5d1f289f93a0f4866509d SHA-1: 5e799c3e4775e25264fdd0925f82cfda546dcfab SHA-256: 6b064846752a646acc3b0ce8d0db96d2992a8e673cb06e273709c0e19c58f107
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=best+photo+editing+app+for+android+download PDF link annotation
    • http://duszek-lasu.pl/userfiles/file/98407036666.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/89978833804.pdfIn PDF document text
    • http://www.andreapondika.cz/file/mavujim.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/29944424388.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/rikakirabuvemagabezugu.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/medozojevepuruketaposev.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210906222919.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/wutilovifizanoxab.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fccbbe8947---sitok.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/zevujesolisasuzubare.pdfIn PDF document text
    • http://ausafe.net/images/art/files/54036054037.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/rulebitudogebiwifezibi.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/72145718639.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/5335a12088a05292c105367b802cd36b/datunorifonedoxekatup.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/febenazepedasupemedol.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/tupaxir.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/razesawalonixobotewafigad.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/49236538944.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109120757397334.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/didoniridafefinok.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/pavemu.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/tubalabobiziduxupafidoro.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/vazanikojogufogapeva.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/merezosovavaxefom.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/31731930222.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_off0000b9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AE 10916 bytes
SHA-256: 92ec1ecfe880120e9de6c560c8250f8c456b0bb5f5180ef311a9a7af74e4fcc2
font_01_sfnt_off0000d2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 16688 bytes
SHA-256: 26156f4e0f177deee897aef5558c72993ebb881bdb2553d1f67ad287d0754a1d

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