Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee627d74e894350…

MALICIOUS

PDF

78.0 KB Created: 2021-09-23 16:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2968964a8ad5dbc6eeb312fd64f52397 SHA-1: 250e7b57024450a363e6e7ce484b6c45023d93b0 SHA-256: 5ee627d74e8943500a768a24b2559117e145209d7142d2dbee1944df0a2b2a0e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://laborke.ru/uplcv?utm_term=video+editor+and+video+maker+apk PDF link annotation
    • http://vivaibonomo.it/userfiles/files/56145547735.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/fezupegabulina.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/51661935348.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/wekizadugi.pdfIn PDF document text
    • http://446888.top/userfiles/file/26075444264.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/dowuvotoruwevep.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/47723797243.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/659732075.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/todawisali.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/jepesifelunugaviboz.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/56953294173.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/75057859903.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/niwipowozigilanufexunofib.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614298fabbb08---67599639034.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/67880965487.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/51782678259.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/42220114509.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/dageromavo.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/64402787658.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/lorivutekitezen.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/nolaserajekewizaf.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/33894903928.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/fobukemarevigebofonotixoz.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376b58b4660---10977688556.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/getemufuledapi.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_off0000cf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 10464 bytes
SHA-256: 6899b594eba7cb6da6e04a89d2c5fe3e00272f4241e84e2dd35687cf87b7fcf3
font_01_sfnt_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 16696 bytes
SHA-256: 7ea821dd7f92288236844c94a3ba25cea70eef9a971bfc99e8c7d89a6254ed1c
font_02_sfnt_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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