Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaab171f8210d85…

MALICIOUS

PDF

85.8 KB Created: 2021-07-02 10:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e0cd2334e68cb812d22cb45e06022de3 SHA-1: 55807355a62aa261d99a8e3dee6d2115cc228a23 SHA-256: deaab171f8210d85e3220e7cf9b0c942d22e0bc78dadb3ad53689ddd12045fcb
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable or compromised hosting supports a phishing or malware distribution scheme. No scripts were extracted, but the overall structure suggests a lure for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/abbf859787a3aa77fe7f01b63d8312cc/xuvidugebotagaro.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/e0g5s05tagcraug67ve4f08qjk/55923242994.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/31954968316.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d8c6c1906---78896703958.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cdb01ad7---disufanitab.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/13255648185.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88b82dd93c68d4b99a22b2302624b1d7/34891991769.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rdjga2jr8a1kh2odjjntb4mci6/fefonozuvaxiwasuloba.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160880357c3b1d---fexanop.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6f1a112368af08d97a06665482b1e309/bodado.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/77220509754.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73011050859.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b7377cb0d---pebeverumikavogujopazufom.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c5a639d1f---fupibemixebawemuxi.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/91132727887.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/sitolefenixugubuxoleganun.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/86128109343.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f0214bf5d5bc87a7ce7d1297fc18a507/rowiketisusuwedasasuni.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/wujunuleg.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b7b29963---14318769561.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/36620474224.pdfIn PDF document text
    • http://imi.vc/upload/files/92760058905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=nfs+most+wanted+2005+download+for+windows+7PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 11004 bytes
SHA-256: c795a8ef2209ca2f64f05f455fa478f7572aeebbc762174b739e2e6396953bc9
font_01_sfnt_off0001059c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 16460 bytes
SHA-256: 8f704b3c422da520c7c1f451907f29801219313ce2ba63d7f8ad34cd9314ed06
font_02_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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