Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e0d12a9dc01087…

MALICIOUS

PDF

94.7 KB Created: 2021-06-26 01:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4be5f7cdd9f2e7f3d52b3f1e9187edf4 SHA-1: 8ee23a46dd783af2f23143493d128ce8fcb1cdd5 SHA-256: 93e0d12a9dc01087086fd2a51c6bef63dcd4b4ddf22c35bb4a50036a70637b9b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains. The presence of these links suggests the document's primary purpose is to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=binomial+expansion+taylor+series
    • https://noticky.net/akce/fotky/file/zutoxudoxutov.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/xemanarokidu.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46ce692f9---xemode.pdf
    • http://novichiha.ru/pic/file/16806805240.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/7gg4lhvsbl6901sbdth3rnt434/60093470006.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/3f914ea58998cb5d1e1234c7aa0e2280/sanotoxelofigovepuzase.pdf
    • http://bajcsidavidfoto.com/_user/file/xasifutiwesewowidorono.pdf
    • http://driver-jazda.pl/upload/file/zevam.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607289b850bb2---loximaxeb.pdf
    • http://goref.ru/files/file/domesepup.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/vozivetizen.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e91a6ad614eb1d47f68c3bcb5d78bb7b/70249718442.pdf
    • http://vasvaripalmuzeum.hu/upload/file/73716744507.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/15d7c7b34705af384a981956d2d01430/fewexoguwo.pdf
    • http://trendybiz.in/usersfiles/file/vuzosirudavuzi.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/7finig18l7cnncml9guiujlob7/43500854373.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f059d33f80---likugubezabo.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/af00675e118a787458f7be17a36d489f/rosuwatos.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/roleseduxasomolaw.pdf
    • https://appfacile.it/file/nogovobamoraxikuvupemuli.pdf
    • https://torgradio.ru/new/files/file/93284316367.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b36c109a5---vegofoxatikananulinesuse.pdf
    • http://aihyang.com/userfiles/file/penagilinixiwiwa.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_off00010f3a.bin
5a2d0036e76b4000af9abc30b56e5ba2967eb7d23d4aa795ff7ae0f67850a0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 16876 bytes
font_01_sfnt_off00013b3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3E 16792 bytes
font_02_sfnt_off00015355.bin
eda887dc8258ccf1b245174191a8a11e995d55954add5991107f521841efccb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x15355 10684 bytes