Malicious PDF — malware analysis report

Static analysis result for SHA-256 204d134e490b891a…

MALICIOUS

PDF

78.2 KB Created: 2021-09-03 21:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3e2415f9c24cb88fd8a9821b5a9cb0b4 SHA-1: ebaf2b1125e3e5559a9fb280aeb4bdd421ed488a SHA-256: 204d134e490b891a073d590d16670ffffdb3b3f6c44c4edbbb4a15b8768ce45d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://queure.ru/uplcv?utm_term=2007+mazda+cx+7+navigation+system+manual PDF link annotation
    • https://pet-fashion.ro/mm/file/zumugobinigaxobeguzizib.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607de871da2d2---65881535612.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075b2f0b2ece---famuguxuj.pdfIn PDF document text
    • https://steammining.com/userfiles/file/94981275056.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/92051934681.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/82511845036.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02c51dc92---mokefepuku.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/97f6a9583072fa7fec78f3f80d201bcb/12372995050.pdfIn PDF document text
    • https://kawanmto.info/contents//files/bavibagilu.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/77121490777.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/9921625549.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/39602702904.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f800c56a0---tawibupitupogepebime.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/j8j4gugv5eajvdd63fv9u09u3f/544278837.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/tagepi.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/85u28aa410dbgogr9rqq2cb4r0/58159137191.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b57b3d006aa---56037307547.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d5ca0cd3b2c7046f55159ca24b256b74/nisuxagegijito.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/46857742506.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/vufevowawulenajogoje.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/23714174237.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/0dgviv3e8vpbimug9c7kjsp3ig/73507695294.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5f83f5d74231c700d5a4eda96889175c/wizedavawudawusoniwokupod.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/kakukokuvikunuropijimoje.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 11252 bytes
SHA-256: 7cc8b7aff0153eab4b4f55fc870911265bca4fc2cb5aaa4db25efe348518519c
font_02_sfnt_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 17484 bytes
SHA-256: 1aa23a0679813a16b018d71d90598cd9749437a7d1d901d1100b4b6a2c93c958

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