Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c7576710663ccc…

MALICIOUS

PDF

69.5 KB Created: 2021-10-02 20:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eaa85eb50369ecfb12e8f5875abed7b5 SHA-1: 7c6163b018245c76c6bb62e65942a896077e4e1e SHA-256: d0c7576710663ccc1a851b3b95978521c9c4ec6849a44e4f70a28619182226ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://szjglaw.com/uploadfile/file/2021092618552573499.pdf In PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/41128649846.pdfIn PDF document text
    • http://coolscape.info/images/files/577904696.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/sonimekidelilajuso.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/41405598860.pdfIn PDF document text
    • http://kechengchem.com/upload/files/49557794776.pdfIn PDF document text
    • https://newoptic.sas-global.mn/uploads/files/mibepujegifawadoni.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/lawununepul.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/rumirokovotimi.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/buditolidiwatijevir.pdfIn PDF document text
    • http://rubensova16.cz/files/file/beviwodunobokol.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/4016252036.pdfIn PDF document text
    • http://mfcpavpos.ru/file/zojuvukudutasu.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/siwonubab.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/nowibalesidazedig.pdfIn PDF document text
    • https://deepex.hu/hirek/files/57327909495.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16156c2930c726---91469464065.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/81957057665.pdfIn PDF document text
    • http://bienbao.net/uploads/files/zalofixuwogakewolu.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/ziwurozu.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/8759398981.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/tofinajip.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/50796702266.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/48052516486.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/79831472759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=guardians+of+the+galaxy+2+torrentPDF 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_off0000afe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 15428 bytes
SHA-256: 24178da4f0fd9b421605e012244bedb5f6473cbadc664944391f5cd17d4f110b
font_02_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 11108 bytes
SHA-256: 701c368c7cacf2e36aa0a7268476aff1b0797155d48754d66794f69e715bd57b

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