Malicious PDF — malware analysis report

Static analysis result for SHA-256 967802eabc2c61c3…

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 13:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d22a72d2473f1eb310b2bd9f4951fa98 SHA-1: 6b7023c08fc49ae4c2e889e9aee1061e8a00e5df SHA-256: 967802eabc2c61c32671da27f4d8f71ca98d5b8b283472c0205de6ea485dc984
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. The heuristics indicate it functions as a link farm, directing users to compromised CMS uploads and disposable hosting, likely to download a secondary payload. The 'Remote-support tool lure' heuristic suggests the document's content aims to trick the user into installing or running remote access software, which is a common pretext for malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160879322b2d30---gosinasudakikal.pdf In PDF document text
    • http://partnerplus30.ru/images/fornews/files/36114444865.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c70389d08be---46305671153.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314a3dacb90---bodibitemukadefowedajowes.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/58203271971.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/vukobodi.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d793bad7aa38c55895cc0af239d417fe/golejajuzuganas.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050707001973499.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/74938524185.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/1feb5e7d65b050f8cae6766c23198624/10986799219.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a1784e1af439086e13813baf730d6e73/moriketiwiwonete.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afd81544aa7---6426480554.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/790ab8a36414d78fe6c6959266799953/nogekamivimosepapawetalib.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2u60ro8vlt6pdjacdkprnd9rv3/15025870013.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/puranadexafabuk.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/buzonobezamuper.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/5382066951.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/kivomegip.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aeede38971e---75654598861.pdfIn PDF document text
    • http://www.siposferenc.hu/html/butonojizowowaw.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/85572685969.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8e9e523f247b1472893d5cd55ea7cc6c/vidot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=nuance+power+pdf+convertPDF 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_off0000d49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 17832 bytes
SHA-256: 3e63673c0fd94c84e793fafd39219222456b3ee654d8993e11630127aa6a6b28
font_01_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFE 10536 bytes
SHA-256: b5a943b4ac10b3222bd28d642784071ed0ad6e3a09a7cda019e88de73433116c

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