Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fc185cf17d2dd6…

MALICIOUS

PDF

75.0 KB Created: 2021-09-19 06:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 17cb5ff270fdd65fc8075bfad00a6ccf SHA-1: 2668bca466a4c8dffcda7347b52a14d3ca21a554 SHA-256: 27fc185cf17d2dd65a516ee671c9e5d7d00fe530e5f7b1ca8d82d1f7f6b29bc8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URIs pointing to external websites, with one specifically identified as a lure for 'vegas crime mod apk hack'. The presence of multiple links on disposable hosting and the nature of the embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://inwebjor.ru/uplcv?utm_term=vegas+crime+mod+apk+hack PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c5924b488---45116863904.pdfIn PDF document text
    • http://marketingnews.fr/images/file/panasuribena.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/vonuvoji.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/ravameboneje.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/6369801674.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/35540047642.pdfIn PDF document text
    • https://onlinendttraining.com/files/xabezazewupupuvomawimujov.pdfIn PDF document text
    • https://blogsma.com/files/30689118367.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/23465811782.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/39379738276.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/29266062655.pdfIn PDF document text
    • http://ihdbd.org/upload/files/noruf.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/8233259321.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/60142501599.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/nejunipodejipulin.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/15312210008.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/salonotiromepujekex.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/86432480635.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/21318726301.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/zifeku.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/rowulofixefipilejorib.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8448a7ef8fa4ad201c94cada1ed0ddfb/giwuxamadujawesaxogosam.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/tewuvuveju.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/kefakupokijibawisezi.pdfIn PDF document text
    • 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_off0000c18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18E 10776 bytes
SHA-256: 8de93a61f8e77b831725b69c6270e22be2354972b1aa06c63e4c3d55aa5841f1
font_01_sfnt_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 16668 bytes
SHA-256: acd157c6201b768785aea39884e6451209a8a029412e7379b5211ef6accbac8d
font_02_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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