Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee542c0be8c64cc…

MALICIOUS

PDF

90.3 KB Created: 2021-09-19 03:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5d8662ad62d507411a8281dfad57f8fb SHA-1: bd9578ec6a8ab3507a6c9b8bfa48919e1ecde060 SHA-256: 9ee542c0be8c64cc5a54ad42b084e44dc77cd173b31f022d9f40eaf2e6f82c85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads. The document's structure and the presence of numerous external links suggest an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall pattern indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://10fci.net/userfiles/file/kivixudikodovos.pdf In PDF document text
    • http://estatepie.com/files/userfiles/file/filunu.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/vexuriripuwaxefoti.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/29547199132.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/lotedatisatuwogawujokosox.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4b2ca53f1---10504368463.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134adcf518d7---bewidirasibu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e1fa57f4b2d6c2e744fd003a9768e6f6/nuvepizotidilibi.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/zerirulegotapisiforafed.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/99136229253.pdfIn PDF document text
    • http://brukbet.com/user_images/file/nofimitubu.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/34312928470.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/38c1bb5e2b4b0b99232ca822a04e1579/kazijikedelexek.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/54178869426.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/wosazedolixevita.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/50347191849.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/jarowugobazugutamojewitu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e781f8b0---22077297271.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/13560269153.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/jawabidugot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=imore+keyboard+premium+apkPDF 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_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 10532 bytes
SHA-256: 125fc8cb59cb20f25c2a48a253e8ccf95facb54a866ec9f2f569892e85237a79
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 22500 bytes
SHA-256: 773b0c8e477c7d757ab01db32cd26fa1b3bfd800493176e4d9fcbbcdcd4d067e

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