Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fc5f32ee19b6e0…

MALICIOUS

PDF

95.8 KB Created: 2021-07-01 17:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d15f197c4beb70b12b0294390c08ea84 SHA-1: 1a650c8d538eb37eb7da5a0b216b88f74a65d9ec SHA-256: 92fc5f32ee19b6e0df8e96349f2f15bd8bfb8e5d3df1fe90bf50e8f84e5bd49c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised websites, many of which host PDF files within vulnerable plugin upload directories. The file's structure and link farm behavior suggest it's intended to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/bs778tthafllsh25r9obgrg2u2/55275891272.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/q1d7vsjcvb0b1j4ms70j68i1d5/12471242303.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/5da220ada8fc1634617078ec94128b1b/9179501151.pdf
    • http://aps-mes.com/files/file/resodixuwofi.pdf
    • https://dangeloremodeling.com/nbloom/fckuploads/file/fekafazagogufowimo.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705ff7139eb---56318449371.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/nof5vnsn833hkoh8259u7fo5ck/vezedutufosol.pdf
    • http://knshzj.com/CKEdit/upload/files/wafobosi.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/6b9d0b0b87438750e06dca066d6c2923/jetabonu.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/167ecad11e81dd026b440b624b0cc9b0/bufuvonewuxixexepuj.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16093c44c9e8cc---2293267311.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759396c61eb---79850122568.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/628efa9df5a02fd3ec1ed1ac31b6c054/71202736629.pdf
    • https://stillwaiting.org/userfiles/file/vukanakeresemajefuxoje.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084110bbbfe7---74620648515.pdf
    • https://mobilieroccasion.fr/uploads/file/24849856136.pdf
    • https://securitydm.com/slicice/file/88214425207.pdf
    • http://csc-0898.com/userfiles/file/20210701180807_al620d.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/jimigolonep.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8bfbe4209a7974ca1977b8e7c6d056e1/vuxedoxasuk.pdf
    • http://centreforeffectivecoaching.com/media/file/17600527954.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8636a06ee0---80737142889.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740320b7e1---rulusafi.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f601716c---zupodesor.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/fc073bdceb2d4d11754c5e202c073fbe/58419345555.pdf
    • http://j1medical.com/uploaded/file/sewetoxabi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=system+admin+interview+questions+and+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011108.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11108 16792 bytes
font_01_sfnt_off0001291a.bin
aff0fbbfd6cf7193dedae6ee38b3427ec6b664515018d95da21fe5adcd73a47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 18036 bytes
font_02_sfnt_off0001582b.bin
18b41beb5368fce1ceece77a67fcfca7f93a06e9aa83a8c12d1350dc647fc5e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1582B 10952 bytes

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