Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15a571532578e9d…

MALICIOUS

PDF

94.4 KB Created: 2021-06-27 01:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4bdc6499c827e6c7c0396452257df161 SHA-1: 674583f7e78628b299ec31ba5aa58fe94b994245 SHA-256: d15a571532578e9d0c3e0fdf171ed889c2cdc885c9d93dfbccb13a83097806bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ac7059161fa62d1193f92a959f5cbd8a/xijenulekemepoxezokanode.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/5093a095410418b4986b91b129572593/65194612840.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ad204b5c2---zaxezavikopoj.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af6052042e3---70893768706.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ggqr4ksmkboc9lnbbc3ldqi8q5/nategepefuja.pdf
    • https://nnt52.ru/userfiles/file/68670322536.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/eecfc6713f86d50fffd0b0c342d914d4/fotowokazuwapadazukafat.pdf
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/7o26ip5f2gftibu46lrn63sblf/76420635937.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a106bcb4447---56489435113.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/942ot796tn39h0slkmbss27ftc/43322858473.pdf
    • http://jingluo.net/uploadfiles/files/51427126521.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c7484ec604999576e77a4ce6be6b1df1/12004832782.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a3643b71039---dobikogakobip.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7132c94885---tunuxesaxodivoburu.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/befotemomanozedoralanuf.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/litumevutujot.pdf
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/zoxozotugiwowozi.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751cfdf013---76371441071.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c363bafde658e688f5d7257d6e69e2d6/xojoreke.pdf
    • https://uclerbaklava.com/resources/file/84539827993.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4fa2d0d6ae40969b514bc1ae8d816a51/bugamawukobi.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/0a6db06d7b95d083cdc08589c2dfbe6c/73255382843.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fbe6ca2041a9e2ef8745e01f9927de44/66916477042.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084064b3ffec---11897732562.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=adverb+of+act
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 16792 bytes
font_01_sfnt_off0001123a.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 16252 bytes
font_02_sfnt_off0001281b.bin
d6a2706f9a18513a722a0a1ad0aedc142dc26c74492f613cd1d08a9a7aac155e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1281B 10244 bytes
font_03_sfnt_off00013f44.bin
fc7914496ac89741f06ddbf08fb74c7aea5f7b6554c023de891143ceaa2bc86a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F44 17276 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.