Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79690fa3aeac3bb…

MALICIOUS

PDF

92.2 KB Created: 2021-06-26 11:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ab7ca9a2e0d869e9087fbb1606dcd89f SHA-1: 02e4f6fbdd798182fc900dc058b81cde6fefb496 SHA-256: f79690fa3aeac3bba318635b03bbef3ae96e9622e8268a6d06288e90329598cd
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable domains. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is designed as a link farm. The primary purpose appears to be directing users to external, potentially malicious, content rather than delivering a direct payload within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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://asfalon.com/__files/file/82780663715.pdf In PDF document text
    • http://ecohost.ru/pics/images/file/59728664368.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/e6jvbag0c459e6bre9cn2914hd/xinikufuxixovadewi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/28a07ee33218e18834dce7ca5ea2041c/21148722123.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/55a10f8b84d48e003013ebdcf1df6e7b/14879125452.pdfIn PDF document text
    • http://esejsc.com/upload/files/nozipiwutobasefuvak.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897098b237d---31543815858.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/62107483467.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/difiramevedu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/2d5d4f2be6de031459536b24d343fd05/21068095137.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f86363d7e---4103002456.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a3b7ecfb---xujono.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/patekupobadi.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/hcje0jd198aabbh5n3otnsp2ir/guvaxokujaduwiwavut.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ltmcqlm0jfb7kd5td0bmsk8v6l/daradijemetanoxituzoda.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/pegibunogegewuvetiwimodir.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/38359387856.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/epnpptus60pief96c7jg4ult37/2176897601.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/26490750538.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a440b03ee32---kazofugas.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/6cbbb94b90ceee463e2e1d4aecf5eace/42587577803.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/034c65439230d04b3e7561a75940a4a6/ruxonugobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=motion+chapter+class+9+numericals+with+answers+pdfPDF 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_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 11232 bytes
SHA-256: b7584fee821e69dfe6a9940907b01187cc84e12e27a29823f4d0a99e15a5c491
font_01_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A0 18716 bytes
SHA-256: e3e0dfef013b4813862996cc4b981b237568468ab01ee7cf6046ed161fef3067
font_03_sfnt_off00014b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B72 16616 bytes
SHA-256: 06f1d5f5a9083a80364da0885936c8ddb2848b41a67694407b5e75bff462a068

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