Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed9601b5a21b561…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 10:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 017ea5d04598ca9b2a7e6a215f1a11b2 SHA-1: 098a71f6aeaa3a92cbb287d02a368854b4d386da SHA-256: 5ed9601b5a21b5617ddf27cf2ee2cdaf921872c4f739aa633f6f9417d793f097
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crysiq.ru/uplcv?utm_term=the+fourth+jonas+brother
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083bde2a0a5e---29381664474.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/928780bb6fb1121260ba9a2e458564a5/vulivajutinefunaf.pdf
    • https://anthonygillant.com/userfiles/file/zonap.pdf
    • http://gorisum.net/fckeditor/upload_file/file/kilipogulerofabapusonanu.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160911f584a2ed---pejasapasinigojiw.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/84e8cda2126e71f466b53b348c3d6c0a/donewuxekabawikovibaneve.pdf
    • http://meadescafe.com/userfiles/file/gonofujaga.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/461d95df317e14ca531ad722f31caef4/puwoxomizemalikenev.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3cc68aa33aa6cefcb057bd9011d7bd7/pikotubisuvabikaladisose.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608680286abb2---81106597964.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/odm2aur5qtvu7bc0nch4sa2qvb/74619599772.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d1c72cd7---58214215581.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099d474ce6a5---zavanojigivagepexifuki.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/ed4fbe3a52e5592aaa8c52ea741d242a/59293500985.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/72ca79b199bea526d6d945ff7a4f6953/bamebivogadamigela.pdf
    • https://hometeamcorp.com/images/usr/wugaw.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/35b02ed119015341d54fd5221ffbbb9b/11065707814.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a00c2d64a3---67550382346.pdf
    • http://bannails.com/fckeditor_userfiles/file/debuwopuzerafukugijowesu.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc71a07085---lukeropuvemisipeb.pdf
    • http://ahcxdq.com/uploads/file/030416176912.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088fad80f0b6---lizodew.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_off0000e991.bin
be974699c74557c114735717a768a5d9d2d33f8e490cee4512c494541733fce5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 18236 bytes
font_01_sfnt_off000118fa.bin
2eef5f2a3ab4dfef418a740e625a8bc6823d61902f60e36068b8b4145acd3067
pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 10504 bytes
font_02_sfnt_off000130e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130E0 16792 bytes