Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2ea1d55041378c…

MALICIOUS

PDF

77.1 KB Created: 2021-09-30 23:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 56c65fc0c914977a522f4015b5912e50 SHA-1: d2af111afc0d652da84d22c02852e0496eb16d24 SHA-256: 6f2ea1d55041378c08a9e88ffd43f1939bd26db16333edd80649dd3cc03b282e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or potentially malicious websites. The embedded URLs and the PDF structure strongly suggest an attempt to deceive users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4149a52be---wufepopeduvunisoxadapin.pdf In PDF document text
    • https://smartcirclegroup.com/userfiles/file/94179863773.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d28a1e7efbbf51aa04ff1586f7726d9b/8691685974.pdfIn PDF document text
    • http://eternaseguros.net/files/files/5667367046.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/72699047682.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138169f44053---76355813728.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/bonideka.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/botujigomupowowovufaweb.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/mububinekafu.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/77990952266.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161329c6057713---11132267372.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/kawizovaf.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/56f7df892775671c0d146d58aa0c5fcb/sisajadikegujoxaxura.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/mepifebenadim.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/74699731240.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613676ecf2870---2294288780.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/pemaxovaxosubakewetinubur.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/jutagem.pdfIn PDF document text
    • http://electric-kernbichler.at/wikij.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/puxovawuzurobadewibo.pdfIn PDF document text
    • https://tdfstore.it/file/xuladitumoparebinumazazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=java+game+player+androidPDF 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_off0000bd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD95 10640 bytes
SHA-256: e4c27b232a9ec4b7add9ea2ede346712101ded4b817514da59d3fb62f8fc535b
font_01_sfnt_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 21556 bytes
SHA-256: 9ed832e051ed7a8a1583b9cd137319280dcfc0ba247e18fe98f549f03253df5f
font_02_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1