Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ac9bbc247cbd15…

MALICIOUS

PDF

76.2 KB Created: 2021-07-07 03:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7076557792627aa953186052f607af1d SHA-1: f5916d8c493192ed868787d5822216a86cfb6e2f SHA-256: 29ac9bbc247cbd15b340e0eb4fe8066248de9e490bedd7285534b50e77225d85
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains numerous external URLs, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded URLs and the nature of the heuristic firings indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

Heuristics 5

  • 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
  • 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://infrive.ru/uplcv?utm_term=convert+16+cups+to+pints PDF link annotation
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4c85176a34d58a7d0ae59c3d6f2cc1c8/55799220482.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/sozesarekiparosetalo.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/sifemoz.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/pigubukoxalorefofen.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/odve9i6itdgmb49knng4cteds2/30237700572.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a560ef149---484377714.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a967d733---38736761800.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7cc3ce58---34326832776.pdfIn PDF document text
    • http://heizler.hu/files/file/wagorisodare.pdfIn PDF document text
    • https://noddy.nu/images/file/nevutagonazuk.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7cbe5db399---8253944827.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210619221526.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ace603aff1---ziwubaxelubiluzokag.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b82adb13b19---64046330187.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/kuzedulejotakejaz.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/46367245779.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081ffad797c4---misutuvilojipam.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/hdvs8da8lrarikeqpoj9gh28r8/30045439707.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/43k2a4lv7es3st9gvsndtmcirb/fiwimowevinojope.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ec4dac9c7---43695970188.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/kobum.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/89082935125.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1ecea994---zosovexozeda.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/jvmekoe0bismf9822seirhmee2/vinerujomuzilevuno.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609861760925b---gofuzugogala.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/bubimubabewori.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D5 10576 bytes
SHA-256: 527e2ab16764f9fcd892d7846fbb8c2cdbc97be71921f1fab66bd390c556ed1b