Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d8af774ede57b6…

MALICIOUS

PDF

95.3 KB Created: 2021-06-29 21:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 945c96f2e87e27fe3467a8d090b7bfb6 SHA-1: a2f61b0a9c85c007ebea9695a22189f71126dcdc SHA-256: a7d8af774ede57b6a86aaca372ecab8579f2b034faf45d275a4418a540d0a726
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further payloads or conduct phishing. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e06396544---35206652853.pdf In PDF document text
    • http://ahlhy.com/uploads/file/052251507505.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/27556283180.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/76910557036.pdfIn PDF document text
    • https://unosms.us/userfiles/file/tamapimagelizajudifida.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/b8fc6bd69fde18ce9b14d97239e1228a/gonatiwukukatutetiposim.pdfIn PDF document text
    • http://mobilenmr.com/files/files/juvipekebevakusube.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/bec2793185f9f2198a3a28bb32d2a91c/jugivuwebazijesexopukorik.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/db267a62563da86b1f6f0e02463cf875/15968639934.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a283b829993---mozejadikoxema.pdfIn PDF document text
    • https://asiabiru.com/contents//files/47357928218.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/77f4cd280d2e0173a4d51993f8832ca5/xululi.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/81381618077.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d63adea9e99ab1013607520496927598/40373615353.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/84a38db67630b018c01c64c0be3c0aff/vusuv.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac57f2436---39798497960.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/rni7oqdctb4emljnjdvjslo7mp/simewafubupe.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/92640454701.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/240edd0f03e05d342b6fa28ab297972c/joxomibaje.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073405873119---gavoxevutejujizarowiti.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a43f6508836---3791802995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=123movies+the+boss+babyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 10692 bytes
SHA-256: b84046c20df63078fd9c4ea42c6b251cc3eb71044b85c28d06c72428e2c460d9
font_01_sfnt_off00010e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0B 16732 bytes
SHA-256: 8d839163a044c5a229aa92abbb3030be13840ad39a79f32dd9c29cff439fd2db
font_02_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 18912 bytes
SHA-256: f21d29c3e9e0bbe9b3ec6bea00e232e3ff11d1b942f0b0c06c37ecdbfa90824f

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