Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70880d16d87eacf…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 08:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 737b1d3bc43740677ad166561d2270a8 SHA-1: 58690a6be18df66bd0401d6af853873928209219 SHA-256: b70880d16d87eacf7f5cffec4b0a113dd838fe6708404a04b999ec31808dcb10
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af3fc37efa---dimarex.pdf In PDF document text
    • http://bulk-supplies.com/userfiles/files/84535789678.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/laxugasuzozagad.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/lijox.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/nidolomemesutas.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/50209154721.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28578726672.pdfIn PDF document text
    • http://orthopediedelft.eu/files/95734508296.pdfIn PDF document text
    • https://granitnet.hu/editor_up/10406702922.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/57436438126.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/janetapej.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/vipanonunudadotegixusobi.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/65155448840.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/ruxebizefuzodawoworuvumep.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/navidamab.pdfIn PDF document text
    • http://imbirimbir.ru/files/54733707096.pdfIn PDF document text
    • https://best-label.com/upload/files/nozabufazuzem.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/17499785536.pdfIn PDF document text
    • http://reichspfarrer.sk/file/48162368963.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/56748943992.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/88028162872.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/misapamisonulojabukux.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/smlt6bfh7it9ked3hsadog1pvc/dekefabuguzerisen.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/85600599108.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/19166622251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=chrome+debug+android+appPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 10800 bytes
SHA-256: fd0019f4d455cebdfd83b744a68c139de199b701eb6297eae1c60567ba5c31fc
font_01_sfnt_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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