Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e289721198aea5d…

MALICIOUS

PDF

98.7 KB Created: 2021-07-08 03:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cc974dbc10b2f2d0deda586b578f2fac SHA-1: 5fb731271abfc350cb45acdbaf0d18a7e033bd70 SHA-256: 8e289721198aea5d2747d05e662b9a6b91526f766e0781f15b95af336cbdf949
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://alasclub.gr/neuro/ckfinder/userfiles/files/88075356950.pdf In PDF document text
    • https://saunadlaciebie.pl/userfiles/file/fumajowobexajix.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c884b854a---jubesuxalo.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e20034c54d2---daruzoma.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5070cd0f5f---tazenaxuvijulugupax.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/13696488138.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/82a026a4ec274aafd248871be62c7242/rogem.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/lukiwaz.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/nutiw.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608220fc73bc9---78591249595.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/kojop.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72ce7a2d94---30359026382.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a730dbc2ce---26962539347.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/3562535489.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/gidajeguwelomidufetizom.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/15fe55609cc321c986ed05ced15b7211/dexinunimudoli.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/44333123745.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/dc19p6bdkl7cqm5kcb01uif7s6/dajom.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc90e0d454e---61448050607.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfe0e69a69---19738687838.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/91536620106.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/1u46blggm8pnkh4tu3gbircn30/goguxoduvo.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/69583576709.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ca9f2fe3246fd59e22489430ad2fff17/lonopisaguloxetisojul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=st+charles+anglican+churchPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 10564 bytes
SHA-256: 0be3c2dcf1302ba786d909a6068b579afc5ae602ca83b58373584467d8cc254f
font_01_sfnt_off000136d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE5 17904 bytes
SHA-256: 123442b0a35ddc7f2bb6aabb1cfe842cf521630817a6191f209f241a466760d0

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