Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95be966da260d83…

MALICIOUS

PDF

90.4 KB Created: 2021-07-06 00:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b654271ab3d9b90b3b3753d58a09c106 SHA-1: 2d6128abdbccfc4dfaa8ec82a04e484bea720cc8 SHA-256: e95be966da260d83197c46500ce3b6634d4c653be2a607f1d382057a90eb169f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its intent beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://philabc.ru/uplcv?utm_term=unlovable+the+smiths PDF link annotation
    • http://mobilesamara.com/img/files/file/zixufowowagisorunezu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9c0734156---kaxaxi.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/abu5h1t9o8sh64mc7d2ika0g88/purijefogozus.pdfIn PDF document text
    • https://airbays.com/userfiles/file/dogavazikufozegoji.pdfIn PDF document text
    • http://amandamaitland.com/images/file/79294827314.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094615aa49bf---1369278094.pdfIn PDF document text
    • https://projetovm.com/uploads/files/sabamitefi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/999b82f22cbb65096eb428b3bdf78a66/26325118362.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/95678962772.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63784192127.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3055a680f---rugofusujekolowepavu.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/61011340595.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/jineboruteresepomepid.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/juzifij.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160904e623332b---tipaledufotarakak.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/scgqskbf9asi1ijkto3cjq0p67/7428581712.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/82142175454.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/149dfd9d055acfb3f6eaf113534abc95/41492451892.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/pp4j98lg5u8aq088ndo18m7tb3/19863495351.pdfIn PDF document text
    • http://klefmarken.se/upload/file/pudawemizo.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/gexobozibibawilix.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/pesajovosepadixutije.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/mitadigitizevuxoliwemujag.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 18820 bytes
SHA-256: dddeccd9f8d7f12f70ff571394a973a002210c5c58fe97cf6875fe2b38521090
font_01_sfnt_off00010e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 10484 bytes
SHA-256: 1a5c8c5bd58bd86d00bdff137fd0f23778d3c2ff840db704a85850f5aa7c024a
font_02_sfnt_off000125ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_03_sfnt_off00013b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15385 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13

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