Malicious PDF — malware analysis report

Static analysis result for SHA-256 93899027e1839846…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 16:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59aa67d4c9524e32d84de1a321dfd455 SHA-1: 88c70c910abd12a5b0b988e5ca17278dfc0d6295 SHA-256: 93899027e1839846c3986ed6565a67146b1e644cb95b0bd7de493e8cbab06614
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, for being malicious. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's purpose is to trick users with fake lottery or parcel delivery schemes. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may contain or lead to malicious JavaScript, aligning with common phishing and scam techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://wakabaeducation.com/userfiles/file/mavufub.pdf
    • http://everest-c.ru/ckfinder/userfiles/files/mupufit.pdf
    • http://associazionemillesogni.it/userfiles/files/liduxubigexasaveputago.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161342fc6515c0---wekeb.pdf
    • http://gibisch.com/files/files/noworipabuk.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16310844390084.pdf
    • https://barcelona-health.com/files/galeria/files/vuwujunokanaw.pdf
    • http://eva.am/files/704a12c7ab800a4f.pdf
    • http://xinshifm.com/userfiles/file/82485234709.pdf
    • http://aktifimmo.lu/userfiles/files/53713701216.pdf
    • http://beiwendq.com/userfiles/file/11650389147.pdf
    • http://i-harmonics.com/upload/files/zakovi.pdf
    • http://elverum-revmatiker.no/images/file/8553345049.pdf
    • http://bodegaadrover.com/userfiles/imagenes/27413751356.pdf
    • http://kronospan-mofa.hu/editor_up/novajafebisuf.pdf
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/dazusipitefit.pdf
    • http://sdes.in/uploads/73822397187.pdf
    • https://usgcambodia.com/userfiles/file/28169005373.pdf
    • http://flathead.herosuite.com/userfiles/file/95964289083.pdf
    • http://yizhu580.com/ckfinder/userfiles/files/45141532577.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6f00245e3---29233713317.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131d2a92e0e5---42605783413.pdf
    • http://nato-denkmal.de/uploads/file/23258185092.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=go+vimo+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def9.bin
9ad69b5e641adf6adb025188673f8b19347b355770b865fea10e947fe4db2edf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 17216 bytes
font_01_sfnt_off00010b59.bin
325bad352a2ab58f1a7d66d0db9a2359c9141ede41770fc4a6a1d2f1d7212d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 9964 bytes
font_02_sfnt_off0001216c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16792 bytes