Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a153646d23c008c…

MALICIOUS

PDF

106.7 KB Created: 2021-08-06 23:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fc445786e926c59ade439e8d081419cb SHA-1: 68bc7d8c87dd8dd11570caa8faf74d66147f67a5 SHA-256: 6a153646d23c008c323b4c268dfb529aef6d34d91b93b2bca3bd2f41f74c6ce0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS platforms. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be used to trick users into downloading an archive, potentially containing a further payload, by providing password instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://qapoll.com/2015/vat/upload/files/limelofalakaxusokimi.pdf In PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/15502747154.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9cd39f17b74e0274dd317d17325feeb1/nazazurolapopiborilafan.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/gegodawiduveteg.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lotqnhb11qrno11f4udj598cg6/jelozoziwaga.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/12758487884.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/db40959ad4f16bc91f4aafb74a4e7c60/7055246698.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b033b915facf79a1a53e76933f1e9ba0/55992506149.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/8fc762c602e755a6905ada1fba7acb09/vajetifevazetixapilifif.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/311519880.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/fojupenenofed.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1610b6281e8647---37202880489.pdfIn PDF document text
    • https://factinet.com/uploads/files/44398991061.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c4a1875340616cbf586cc164f330f3de/78994041847.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/49894584800.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/17416473357.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/pijedavoxagasoxalemenu.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/45735690645.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/sijasuxurevatu.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608035daaef39---nutalo.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ki9re56rq82pnhp0bhmaahdc90/defofatovosinex.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/50796694654.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/kugaratusewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=introduccion+a+la+investigacion+de+operaciones+frederick+hillier+solucionarioPDF 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_off0001358e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358E 19960 bytes
SHA-256: cc9097fe617c1c24ed2578f3ff29b6944ab83b0fcaea02a45dc2795c01a54787
font_01_sfnt_off0001692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1692F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18146 11108 bytes
SHA-256: 160d9ef21f5826460230577d5fe6785742d937a12d8d8d3708bfef58cb7d5eaf

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