Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2713f1a62a614f…

MALICIOUS

PDF

96.5 KB Created: 2021-07-20 18:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 60c7bf475ae1ac71cd36b6b4b657d1ec SHA-1: 039aa6f36e3842530d963e9ae0cbf5aee3479124 SHA-256: cc2713f1a62a614fd998c02be5b6e3546d7a6cd6290d225597b8c1801c1eeeec
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and the nature of the heuristics indicate an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/xidoziwagu.pdf In PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160723c975c50f---26106920441.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/95e00a46fb9dd77d6e96c22b065350ca/95953101436.pdfIn PDF document text
    • http://ledins.lv/cms/file/kojutumimanofisupipufi.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/dazivo.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210701012635_645945123.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/59d2714650864cbbe4ccc54d7bdc2e00/fozadomikifajojozodilomom.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85f591783---nuvawaf.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf102073bf---77636225223.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/93761968027.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/ladavalotedomip.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/92408147829.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/22877383050.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a43977c60b6---baxevodemenifokujugozix.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/sugavujupepemuxuwuwegi.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/37f44146ff877e5175f258195a837b89/52901712555.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dde25ac8f---gitakojabodadube.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607516648c854---savalotezole.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/lasanamazadasanitejeva.pdfIn PDF document text
    • http://sns.hu/_user/file/wazoxizodopibinubexideje.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021661146464363.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/gujopotikewaruxiwuvixid.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/da830d6e41a64b94d562a767e37c9702/99240196293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=release+date+of+radhePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11464 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C76 18548 bytes
SHA-256: 60f3bc3b06957748069df8b8a1626c0a7bda65e4f0358a3cbf434fe481cdc23d
font_02_sfnt_off00015d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D88 10300 bytes
SHA-256: 8b0c5c65d14cc1f2011aff35c73cc04c56d6f1e434c8e26d868d57b920d917c6

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