Malicious PDF — malware analysis report

Static analysis result for SHA-256 5496be52893205e2…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 01:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 353dd3deea296777f5f6b8ac32d1e45c SHA-1: a9c53534c5073eb2a660f5809a4f21fca1acec1d SHA-256: 5496be52893205e2f6d76b43b01a3da9a2d4fb45af11c9057832fa6e101746e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of numerous external URIs is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=how+to+fill+vileda+spray+mop PDF link annotation
    • http://idealhca.com/admin/images/file/vafanijoxuzagore.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/5848274011.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/kdn2q8bru43j9janhsibapas65onp93t/fokuruduwapogil.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/69223510363.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/0qrp6fqsg6htssa694egc3liit/5720586320.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/77094441944.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/1birqodhpegbtk8q7vom11tr25/49516235504.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/46889467600.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/41560ab01f5c80e41fa7f7b203321c63/bejiwuvabujirol.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/manimuzimive.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b29822e9c0---kubajoxisojenuxifovix.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/draputh4v4ple7atj2ko4bnpr3/30035766655.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835bdd3f23f---22888223367.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/56554117199.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210721_214118.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a036cc4fda---15040841961.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/84052955472.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/jowiwizutotarasejibam.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b8e1b753---63484303105.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/nigigedojovatigima.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F8 17272 bytes
SHA-256: fbd4613e7cbcda6b93f8f03b67eb03c99740081c019ff7ce6c4d7646b038b17a
font_01_sfnt_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 10812 bytes
SHA-256: 331c8ac5789a9e41d0049e70b8a55c9cb46a97372a6a2587739dd9fcce696e2f
font_02_sfnt_off00010970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 16544 bytes
SHA-256: 66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
font_03_sfnt_off00012033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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