Malicious PDF — malware analysis report

Static analysis result for SHA-256 db468690ad430f29…

MALICIOUS

PDF

85.1 KB Created: 2021-08-17 08:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e95e9a24a8bb85742a85053154cb651c SHA-1: 807e2ee10cd2bca60acd3a0d75e34f4c7273fddd SHA-256: db468690ad430f29a7f2ba4adef6c1e19b75708a7b6604160cacb3c21588caeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised WordPress upload directories, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da2248d447---37622369087.pdf In PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111714db2946---safosimenenesonopokifijel.pdfIn PDF document text
    • http://labsshop.com/d/files/97931416832.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/acad7150492a9522c33dadaa56045922/76762123351.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6db84093056c7e6bdd879081b8c57077/9578684947.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/69644332208.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/59951383113.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210706_7B825EE18662788F.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b763ec3b80a---tamewo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a3c86067---nitikosuterojorivaresuwi.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27b50ef3f---dudekezogow.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/xudivogitedowafawoze.pdfIn PDF document text
    • https://bliznacite.com/files/24215580614.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/88343537052.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/98914528945.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d4004795176d13fa88d602f110ef3c51/vexan.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/19771618943.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/potazagevux.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/wasuvelefojimotuv.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/56502785554.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965f5f622e1---bibepegodejoteno.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/zalekenulolome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=prison+ramen+flavorsPDF 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_off0000e8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 10344 bytes
SHA-256: 92872ac8c51dafadcc38da3bd4707bea8d86c479e26dd99ed2165bdf684ce448
font_01_sfnt_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 17496 bytes
SHA-256: 7739891adf126a74f79444d1c6c71d9b18027951bb17c3cd7d60bf889b666f7b
font_02_sfnt_off00012ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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