Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a3225e0d9d711…

MALICIOUS

PDF

76.6 KB Created: 2021-09-13 05:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9fa10252bf3da541fb6f8f4a94859cbf SHA-1: 17d8305cdff70cedd5d50ce6e7d88ded16c9d29b SHA-256: 8e3a3225e0d9d711e619fa677ca4a444bcf4c25180d7650183155dfcc0ffbcc9
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://hrmconsulting.biz/upload/files/87529138708.pdf In PDF document text
    • https://ozmutludokum.com/userfiles/file/divetiporowegatopum.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/85602517850.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/zanuridibam.pdfIn PDF document text
    • https://badrivishal.com/media/lugetekumafigiwegedufoloj.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/telusowakivezumepaniz.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2e115ff088c2ee37d5a258712353c93d/gabemed.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/migok.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/tajekasivokasun.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/ritupetajifofa.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/galafidutokugegaduduge.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308cc66a93c---26603381645.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/cbde3b9c4d2331aa4fd809d88f41645b/rugivefefagul.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/35714467975.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/30e7fd7f2a63c647b7a89960979821c1/tixodanidebe.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/wokitenijobirivuji.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c3fc99a0efa3baa66abbbec90d9487d2/48971840532.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/kv42a6pbskao1fnpr7q89mq9g0/pewesobeseginesomijel.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/20793126029.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/pevozimewibebigiw.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/likenuja.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/49405304409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=serp+keyword+toolPDF 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_off0000c7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 10224 bytes
SHA-256: 738d045da7234fb8b2fbb3d0f8bf5fda70146e84856c2718a68e4c0bb56db4f6
font_02_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 17952 bytes
SHA-256: eae297d4cd2a2311a51a10f9e7c2c0fc66ec8723b5dc45761b28720afd68ade4

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