Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2cf5f25fb4a2ea…

MALICIOUS

PDF

91.1 KB Created: 2021-09-12 01:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e340c039fe4dbbab89ef3e7a722c4ef0 SHA-1: 114154e9551eef1f4282c10bbe405e2cf42ef86f SHA-256: ea2cf5f25fb4a2ea43208bbae7ea5a21d7cee6ac1e24dc06c177538f9e88ad41
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://smidgel.ru/uplcv?utm_term=trasferire+musica+da+android+ad+iphone PDF link annotation
    • http://bckbytow.naszbip.pl/img/upload/files/76720584631.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/44014493995.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woxemololoniw.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/fekikamirus.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/mejitakomasijogobobexige.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362feae7fb4---sugobeme.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/6364245079.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/55434627976.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/54923085403.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/76333516826.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/93444413565.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/49667699563.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210902_233842.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/pijepijuzonanaxapejox.pdfIn PDF document text
    • http://ipllaser.in/uploads/35110246838.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/wepopowokatodimefuvinof.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dipulemavutim.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210901220056.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/dovadexutorexanol.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/bimevepelopeninabopi.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/rukakibipezofefowogadoxib.pdfIn PDF document text
    • http://landia-print.com/pdir/file/18928004396.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/xabirigikodo.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/tuxaraxevifusu.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_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 10804 bytes
SHA-256: 56e16424536f2cc78e1e810465821b9214fe3322516940c04af61289e011e957
font_01_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9D 18440 bytes
SHA-256: f275a5dc073aa85743c7a97837c29a85943a9fa3b9e3425cac4aa796a36005e9

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