Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b18489e0e89aca…

MALICIOUS

PDF

100.8 KB Created: 2021-09-11 06:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 88c5e01923705ebb6fb3b14c1b4d3487 SHA-1: ad762f1af3cb7b145538a5902707edec3409ac36 SHA-256: 06b18489e0e89aca5984d8ca7e506b7f1b7aff21d2eddb480362084fe80f6e7a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pretext, aiming to trick users into visiting these URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://synerhu.ru/uplcv?utm_term=avtar+singh+law+of+contract+pdf+free+download PDF link annotation
    • http://location-venise.com/italie_documents/files/gabufaxabesuronuwawap.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/zomeva.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/6108628949.pdfIn PDF document text
    • http://panteres.com/files/files/385810433.pdfIn PDF document text
    • https://pindimana.in/uploads/file/9581322683.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/nokowakekafudo.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e18ada5f1---zizixagamokisigivokamo.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/ligotoke.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/rorovomexatewapirakot.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/bedaxosowazilavedelufaw.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xajuv.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/rugijexozazabigilebodiwi.pdfIn PDF document text
    • http://waypl.pl/upload/File/jewiwela.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6471af0ee---29659246629.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/31285880757.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuxivukofelelovidizodalem.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/berosanazulekir.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/31911272921.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/95280289743.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/20558256236.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/48311780549.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/zuvanadisijale.pdfIn PDF document text
    • http://soles2walk.com/data/file/gesapoko.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/75464220758.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/61774487498.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_off00011f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13724 11032 bytes
SHA-256: e362d7a861721ab4cc47442c9a3c24089005ad2b6f3eae6a84969131b625435d
font_02_sfnt_off0001509b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509B 20096 bytes
SHA-256: 7f87f39e282441017d6fa5b6848138e5902782d9b0ae69e0bf110cd1fbe0adf5