Malicious PDF — malware analysis report

Static analysis result for SHA-256 0955e1191dec5d77…

MALICIOUS

PDF

75.4 KB Created: 2021-05-06 07:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 151b16c58c1eed027b5d7e5a7e21bbe7 SHA-1: 4dc9a9e552a93fb349bdd096061f3a36fef7bc3a SHA-256: 0955e1191dec5d77d0f1369ee902e79428922b5a98a35791bfc108b31646354a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and links pointing to potentially compromised WordPress upload storage. The ML classifier and ClamAV also identified it as malicious. The document body, though heavily obfuscated, contains references to 'Azar apk mod hack 2018', suggesting a lure for potentially unwanted applications or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d230ec58---71251213064.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bvbpo3mgen4qaeulb5ruohthge/65956415947.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f36456afe---7843570582.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160734ec5799f3---99548832171.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607841c2d9fb0---powuxogidebawukuwiwagan.pdf
    • http://kompletucetnictvi.cz/files/file/notawenukoxowojemipo.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/7f34f28f5ece326f31c6fe4f9a24bb77/joxuxibelogewilorugug.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/24193131a458dd67fb0a0b4c24a1b03d/vezimilutew.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608966f143cd8---gemevigega.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd2ec725e---zonopigujekinetagikenonig.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092c00d4eba4---74801917851.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/57dj78p7s43fnse0340cdp4djo/migidusunobagide.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/1912f206ebc0481f98e490dc0949a4d4/27191569762.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b3963757---vixuredimixujox.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160739ab4024da---vojuwipovuwawe.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0492451f96d5474bce12a3157ff95bd6/28024419860.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/1jo2i3f4hn5vcncd51ud114m80/42132984225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=azar+apk+mod+hack+2018
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb35.bin
9523a789bfa0d3d8f9271b18406facd06edd18c22b766160e206bd75e8b98ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 5724 bytes
font_01_sfnt_off0000fe93.bin
38e7fbcdaf7a2d62f019cb9925393275ea864aa1003860d747f6ae14579e0407
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 10088 bytes