Malicious PDF — malware analysis report

Static analysis result for SHA-256 347a1ead90bde607…

MALICIOUS

PDF

84.3 KB Created: 2021-09-18 10:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fa2dc5e95514e69dcdd9ffafb05122f8 SHA-1: 5d08afcc527c2d44a5f3620eadbdafec6da2f3e1 SHA-256: 347a1ead90bde60753db993238980257af9827c57c9eba68c85401f0f80965bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm pointing to compromised upload storage and disposable hosting. The presence of embedded URLs and the 'Download Button' heuristic suggest a phishing or social engineering lure, likely attempting to trick users into downloading a second-stage payload. The URL containing 'luno+wallet+app+download+apk' strongly suggests a lure related to cryptocurrency wallets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pnp-studio.com/fckeditorfiles/file/makavipokawopozaridi.pdf In PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/modasodiwusujiwafazu.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/mivuf.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3dc05e0c6---nidelavun.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/81950131642.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134a3ac6016d---nirixisenuvaxesejosuvab.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/biduj.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/13576827475.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/pazozixofalaregus.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/surilonidipisakoxiz.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/tuponitiziniperowox.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/dodemovedarogodazipu.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/soxol.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/35ad30b151ab60908d86f1128bf6148b/sefilub.pdfIn PDF document text
    • http://ore-processing.ru/d/files/bubip.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/55861850502.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/xawozi.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/64187173582.pdfIn PDF document text
    • http://hrudolf.com/userfiles/bijasitemasumutokugoxep.pdfIn PDF document text
    • https://mavibusiness.it/file/posesilejojeke.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/fiwivusokesugekideris.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/30327184363.pdfIn PDF document text
    • https://davaocarrental.com/images/file/labiwimexufenofixuvi.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/13853616650.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/54643112968.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/73181406395.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=luno+wallet+app+download+apkPDF link annotation
    • 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_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 10260 bytes
SHA-256: 37507dd9dc02fd55b4eb1d69fca1756b9f2a78a07b9f63b1b3d31fa4fb96f050
font_02_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 18512 bytes
SHA-256: cdbacec2d2ca832855917a8223038e3fc2ca3189bf008f11843a3c18090d1882

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