Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0429f256c3df14…

MALICIOUS

PDF

82.8 KB Created: 2021-09-11 15:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 16b59bde687e12932b69a7430588e63f SHA-1: 8f5a506efa3a829b785c6362a722c6b61a0e0003 SHA-256: 5f0429f256c3df14783dc739e8588d9af13f316332075c96b8e7ae9fe8a86dc3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • 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 http://drivingtesttips.ie/fckeditor/userfiles/file/lefazogusezigudat.pdf In PDF document text
    • http://pate4me.com/userfiles/file/17444730830.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/tobifoboguwuviwede.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/81248743349.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/zowuna.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/vimijumizodefe.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/61298271200.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/pulur.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/gizogogejajorinoxivu.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/67593728529.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/mibilur.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/25956865603.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/ruvebise.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a772fe1c14---56411326254.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/wogobagibiwutufofas.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/48369922166.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/62891844450.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/sowawesosinuwive.pdfIn PDF document text
    • https://profm.hu/files/file/mojadoxotobawupigedifones.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/74017697306.pdfIn PDF document text
    • https://12shio1.com/contents/files/mejifajivamolopesi.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/20070477676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+check+on+instagram+who+visited+my+profilePDF 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_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 11416 bytes
SHA-256: cb970f9df281611c8cb6f6f3d247d0682c4f36fb490e664bd6ac51320c76dc0c
font_01_sfnt_off0000f774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F86 17960 bytes
SHA-256: a13a3a73f036f5de659267881623b69d08ca62b87d15bebd5341a7cadc94f87a

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