Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7ad96c7cfc78f0…

MALICIOUS

PDF

82.3 KB Created: 2021-09-16 16:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1a7ab5c45e288c092bfad8934dcdf9e7 SHA-1: cac5c196f8603a272a75a24ddc95656f3db98a0d SHA-256: 1d7ad96c7cfc78f08b1175164edd5efb72eaf864e0605a07ecfae4f6614c987c
156 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. The document contains a link farm that attempts to disguise itself as a Minecraft download page, likely to trick users into downloading malware. Several URLs point to compromised CMS upload storage, suggesting a pattern of using compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=minecraft+download+free+download+android PDF link annotation
    • http://husplaza.hu/editor_up/52130561622.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a1dd9560596f7aa425320cd8794e08b5/67402245214.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/65005698709.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/80925744541.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/57182351089.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/795eacdb9a095ab132345c940c44a8c5/67541140410.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/57067498945.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/xedonakibunanaj.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/geziluzewukofisoze.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/lidod.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109151949353592.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/hdhqnv10q4kvb11lc5molmt0i5/jelenivu.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/7b812bruetodp1btv75gqi8ll6/febifobegetubedasate.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131c829c5175---kesosizilokun.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613515d027d7e---26628798882.pdfIn PDF document text
    • http://soles2walk.com/data/file/82223430341.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138f73a16e6d---22829738658.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/87731804439.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/pizenuzidozivuzuwevimire.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/masefixilu.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/vesuziwa.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db79972d52---67521809112.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/6713136515.pdfIn PDF document text
    • http://imi.vc/upload/files/39353807177.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/84059000750.pdfIn PDF document text
    • 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_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 16932 bytes
SHA-256: 053d588cad40d57d54193a30d9c20e4c5725e523dee9703a0963ecae724cf8d9
font_01_sfnt_off00010bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 10380 bytes
SHA-256: 0a34e72afd48535dae6081431935dc5363a83bbd7a33300c73a5d04eb93a2a06
font_02_sfnt_off00012363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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