Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc02d87444418fa…

MALICIOUS

PDF

84.0 KB Created: 2021-10-05 21:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d58947064ae856abc8bc8ca6320eda70 SHA-1: df26ce5151ac8ea1ddb064d449b433ba12ba812c SHA-256: 7bc02d87444418fa7f23d725e2c831c2f9b32f8f833ec61f4ea3dea91ef9e817
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, with one identified as a link farm on disposable hosting, suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the presence of external links and the nature of the detection indicate a likely attempt to lure the user to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://warungmimpishio2.com/contents/files/zotuwelilavezebi.pdf In PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/bikedugeje.pdfIn PDF document text
    • https://kawanmto.org/contents/files/68073969155.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/54268292032.pdfIn PDF document text
    • https://xenonsvjetla.com/files/83436608829.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/dapikizaxiwog.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/15866345211.pdfIn PDF document text
    • https://hot-pol.com/images/file/dojefona.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/16366965191.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/42420606128.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/matuv.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/mojidotusise.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/zuripopeliwekim.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/forejexuzawanuda.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/savugiwipibezabavisusojop.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/xujivojafebagupox.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/wuvemofokakuvosisolagap.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136986e3c9c0---51688934923.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/60079312798.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210905133342.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+government+of+india+act+1919+clearly+definedPDF link annotation
    • https://bep.semmelweis.hu/userfiles/file/naravelufinovubid.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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 19612 bytes
SHA-256: 200203ed390d92c46ef5f5dfa8e87bfd05f934ce64ecb26fb1f9ca4196021b2e
font_01_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 11116 bytes
SHA-256: 7772cab4fba1b6e8dc59195811ddedf2e32213fb571a7300d0d03f391c78a89d