Malicious PDF — malware analysis report

Static analysis result for SHA-256 468cdd1fb02e8577…

MALICIOUS

PDF

85.0 KB Created: 2021-09-17 05:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b5f316196cb16d47c668a8f39923a2bf SHA-1: b1bd1d670c0674f3e47107e9fc79267ad68d3d5e SHA-256: 468cdd1fb02e8577dcdd0da20273d3ba3ff65f28e70da4d054d137b64c67653c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://jiendurancecoaching.com/ckfinder/userfiles/files/lizogogozukit.pdf In PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403024589f5---dorosubuf.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/30868865760.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16141a90d13c13---gasoperiwuzozofomi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/26dccdeb1144bf7a12fd8bf0b2f6e5a2/befidon.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rofelenejikurovokure.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109150549564936.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090304063573499.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/wazubikakozezanitudujolu.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/14728231113.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136739a7fe8d---82556922766.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/53897664551.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/ginofitofexi.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/roxerulagizorodapuri.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/98807352230.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/xapabusifimoporuxe.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea6956cead---kukelevuragazalanul.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/dukojodex.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/zikolun.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b33c0d13a---70592242525.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/fivujuxaxuzebamo.pdfIn PDF document text
    • http://art-ball.net/files/file/4013627493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mini+militia+double+gun+apk+downloadPDF 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_off0000e156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 19968 bytes
SHA-256: 69f8c3f5b6aad0a208c776041d0e6d3111729eb4099c72af41529f474b6a9e0d
font_02_sfnt_off00012dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAD 10880 bytes
SHA-256: e72f3e147a704c1bb6aa05d6840265b95a29698d5f2205b22b1bfdd17dcb0d2e

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