Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d364b8b1bb4bc5…

MALICIOUS

PDF

103.6 KB Created: 2021-08-05 06:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1461f4cdbe75fc6b2545281a086cf098 SHA-1: 1cb466574a42f921dd026f9e7b3d27eaad93bd61 SHA-256: a7d364b8b1bb4bc59c88c39cfdf5380653bf1a5fc9aee43d475c219af6134dfb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely contains instructions to download a password-protected archive, a common tactic to evade security scanning. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and heuristics point to a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bazakizikuzilixu.pdf In PDF document text
    • http://www.rpv-drachten.nl/files/file/7298063341.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/s180tevbikd5bbi70lc9skvdb6/mozuwogoxajivoxetosamuwam.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/22933455597.pdfIn PDF document text
    • https://www.pbri.in/ACP/ckfinder/userfiles/files/nirakoxotaxegesuf.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98571500006.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f7974f677---pezapagatidisegumugukuge.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcb543b40b---21906671424.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c619269a814---27540707855.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a8ca6b7c2a998fee6917822dd86f3d4f/punatemuwepilazuwe.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4ac089934---ruwemos.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/62724259202.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/61729544738.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/rawubozijepudum.pdfIn PDF document text
    • http://vejwun.cz/images/44888541539.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/71886067522.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/31381826690.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/99675794145.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26df4c8234---movenelemelelugu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0a223f11a---31524218209.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/zerefofi.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160818996d7d3d---21739440718.pdfIn PDF document text
    • https://tipresentoio.it/images/file/zirudebomilonolivewuduke.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f1e0c61f3---batalituwun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=free+download+gta+4+setup+highly+compressed+for+pcPDF 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_off00012e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 17856 bytes
SHA-256: d0460e1d7c38f5fb54842db3f928249ff25855f8628266d120fe8ef59a994047
font_01_sfnt_off00015ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA7 11420 bytes
SHA-256: 4093872765a40968c04e814494de636c04f5968540377689788390763e9de5bb
font_02_sfnt_off00017753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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