Malicious PDF — malware analysis report

Static analysis result for SHA-256 6225fb264b77eb77…

MALICIOUS

PDF

67.8 KB Created: 2021-09-26 23:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e9fcbf18bb4de70decc7ccfabdfaba92 SHA-1: 3b808b42e491e94fbb5c080373f50e4d22ff5ee8 SHA-256: 6225fb264b77eb779dc94d4bc9eeff1a248585dd1b480cfc4bdd853dc429b05e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nomylo.ru/uplcv?utm_term=snap+downloader+for+android PDF link annotation
    • https://bccphil.paramedix.biz/uploadfiles/file/saboneki.pdfIn PDF document text
    • https://clubon.top/uploads/files/70120442106.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/bixaginedebupogimovefi.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210926193022_hgo5ic.pdfIn PDF document text
    • https://sme.bankai.lv/ckfinder/userfiles/files/52796017222.pdfIn PDF document text
    • https://questyme.com/userfiles/file/51701421403.pdfIn PDF document text
    • http://k1a.ru/images/files/file/binuwazof.pdfIn PDF document text
    • http://balbu.eu/uploads/news/file/63510626487.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/silupid.pdfIn PDF document text
    • https://sergiomauri.com/images/file/65448636582.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20210923_205612.pdfIn PDF document text
    • http://mastervin.ru/files/file/wapevededupexamed.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109101231491821.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/33060359050.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/ditufes.pdfIn PDF document text
    • http://kdekdyjak.cz/data/92458152278.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210926155925_sded8l.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///jatij.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/pasumeloxobavo.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/wozupezi.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/mopupimuzodalafo.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/35366637130.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/85724334029.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_off0000adfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFD 10388 bytes
SHA-256: 9acf3ebad28961b945f4b358f9efed16d485267655c98dbd82067180522d7ba9
font_01_sfnt_off0000c59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59C 14636 bytes
SHA-256: 27bba44617427707d90a743a9318c5c5e18a75aa655ed2d8a22a3185a8577762
font_02_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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