Malicious PDF — malware analysis report

Static analysis result for SHA-256 75289337a18317fd…

MALICIOUS

PDF

92.1 KB Created: 2021-07-10 00:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 092e5032b46b58be3bb15dfec23c391f SHA-1: 40d8d7d2f2f3d6f9ce027066368415aeca95b0e5 SHA-256: 75289337a18317fde0b04985da21b50b29986e1df3ffaeca2688a0f060a72f86
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://cructi.ru/uplcv?utm_term=traditional+art+to+digital
    • http://majcentrum.pl/user_uploads/file/buturonugifekatojutuminu.pdf
    • http://montaze.org/democms/userfiles/file/tosoxefemivu.pdf
    • http://fonnepal.org/userfiles/file/23277769803.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f7f074f4f---mewakevozesukexov.pdf
    • http://arch-teh.com/pic/userfile/55179848752.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607899224c22d---renetukezedatu.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/t3kvllr7vrpfr2p70ur56s1sj4/dobexuzipe.pdf
    • http://dgjst.com/upfile/file/57993611565.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5f9ec9023---bapebubuxidugosagaguma.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/528235bbb5ad4da09231b4076f4f257f/24018915872.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160785368cd49f---masitu.pdf
    • http://lawrence-spruill.com/clients/42275/File/70090690016.pdf
    • https://nonbodepsg.com/uploads/files/46179811375.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9b247923---bexogujogojav.pdf
    • http://aep-tc.com/cache/fck_files/file/mujetasamidowev.pdf
    • http://angelofthewinds.org/ckfinder/userfiles/files/11324306778.pdf
    • https://soalmatematik.com/userfiles/file/kosodakegavatosiv.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/4139d30284869345e60c390a2094423b/9810707053.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/kuvefe.pdf
    • http://angarakshaksecurity.com/userfiles/file/dikazuxi.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160815a03b01ab---43181583162.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/11440736416.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/5ab8370c494999d7a15c970415464db3/18058930165.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/da292be68ca7e22542a46f227dbe0e67/80698646674.pdf
    • http://nage-z.com/ckfinder/userfiles/files/12261052712.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001073b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1073B 16792 bytes
font_01_sfnt_off00011f52.bin
19f33568c8b25088145358bc7465f108a680f21a8b862ee61fb1ca98d5391067
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F52 10088 bytes
font_02_sfnt_off0001359f.bin
6d314f5af4f8aba5acac7e93733eab3d66cca7afbfcd3f887cb6e61d8509a847
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 17368 bytes