Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12592685152a6c1…

MALICIOUS

PDF

71.4 KB Created: 2021-09-27 08:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ef52aaf994e687ebc2796b36c5516566 SHA-1: 8ac866003a4f960c13af0a107c78cdd85f27639f SHA-256: c12592685152a6c1d721a243b47c08f67a4579bf08d181bb6eed9454dffbd812
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm or redirection mechanism. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://beta-rc.com/upload/files/riraziwupuki.pdf In PDF document text
    • http://videofilm-tv.ru/content/File/ririzivov.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/womepariribawogudekebesi.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/fivawiruvawopikibo.pdfIn PDF document text
    • http://rvhifi.cz/files/file/6663508307.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/pelukojezisobefivesefav.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/nih86slvk7nm33br696mb2j7s4/fikesosigedemawonorez.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/90931160258.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/95036477808.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/dekiwawisetetinabaj.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/66904161533.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/88762941678.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/salozoviro.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/15701385517.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/vutolewololumalabe.pdfIn PDF document text
    • http://dsraxys.com/uploads/jubix.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/40799241008.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613dd40fa506b---zegojepivotenugofili.pdfIn PDF document text
    • https://ahha.az/userfiles/file/lepetejedud.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/63807494127.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/xesufedizodijedakod.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/modojegozuko.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/84053354646.pdfIn PDF document text
    • http://sns.hu/_user/file/midexemiwexesufes.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/24899071787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=instagram+strategy+plan+pdfPDF 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_off0000b4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CA 10696 bytes
SHA-256: 5bce92b9079894500be83f79482d45e06c92718a76231ed3d4bf85ac9dccd2a4
font_01_sfnt_off0000cd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 16784 bytes
SHA-256: e678b40ef0426c8f16ab51368dd5bf94c2f1b6e762d655103d4dc55de7032e0b
font_02_sfnt_off0000f7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.