Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d745fc2cd15c63e…

MALICIOUS

PDF

82.4 KB Created: 2021-07-24 20:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5fd9bafc1be42e9657fa641f000b95a SHA-1: c0c08cde4561af173fbee7e942ab3e7ade135593 SHA-256: 3d745fc2cd15c63ef3d17cae8fbbd4ea6311330ebe5a8080b7281715384f66a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not directly analyzed for specific actions, is a common method for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drticket.ir/basefile/drtiketcom/files/39962455279.pdf In PDF document text
    • http://munsusa.org/userfiles/file/20210716050851.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210630114148.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0314282cc---74389174638.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789b7d1be8d---kuwafokari.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/irikoxifepelirojobivate.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/23528657047.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/xamepowo.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084e93153182---nojiwob.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/vikevenadurofewamaz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d9737bf6---73038965350.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b56afaf07f8---fajedawipexuwokezimot.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4e725d158---28425895464.pdfIn PDF document text
    • http://stromzeleny.cz/file/mokapitadizerev.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/zojewaje.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/d26a1bspbn1te5m1iiv4046kdp/49838734313.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/39010115949.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/o2mkmaaeee8urg0b9nvpgbrkq1/tigitukovuvazitibot.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/8d2150142abbfa963458d89622f153e7/36942530800.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/72264134772.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/dbd08b6e79dc8a6070bc5c871830c639/jewizegaxupagajatumeza.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/68060a10e6c74597b557db7057298576/94537087683.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897375f1ea1---60885441404.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/59872e30fd5f16fca5cd640e46319ed2/63339484684.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/sededakelitumoduxuwobega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=watch+call+of+the+wildman+online+freePDF 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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 10652 bytes
SHA-256: e649a3eac216d34d7a789cdea0491b5cbea01aeefe7c5d84a62373cde027760b
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 16696 bytes
SHA-256: b2b1d9b24ffbda1527269c568b5ba1824ec0f5d1e21eaf5ba2edee35f08e6929