Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d4434ff4974e6f…

MALICIOUS

PDF

54.3 KB Created: 2021-06-06 02:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4baa7857d246d2f7312971c237bb951 SHA-1: 15fe591842481cdf3264d6bb349f76958b953369 SHA-256: 29d4434ff4974e6f9eeced7ac000668b882ef1e17323f226146279e877c18db2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to distribute malware or conduct phishing. The document body includes a lure related to 'Hack para among us', suggesting a social engineering tactic to entice users to click the embedded links. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7916

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://crysiq.ru/uplcv?utm_term=hack+para+among+us+descargar+siempre+impostor
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5e9f04ec---8509726178.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/1im828i4m7bsvv2523jimc9qha/mufavebe.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cea85d226---98183379796.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f1b73dc464630ad40484fed672f305dc/wejorukutigegozezuf.pdf
    • https://goodluckfishing.com/ckfinder/userfiles/files/xefiwu.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074a3f1245ec---95670883526.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b4978059d97---kufufekewe.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b8c4a795a---95736419362.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607458517d96b---80673748192.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad045556b---70416936385.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a936396c02e---devuzivatiwokekejowado.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/198vd200sm8b2045brq0fncsvb/mowiwuguriralug.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5aeb1df93842da60ca4e6d663ec7a81f/fuvavivimoval.pdf
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c060.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC060 6744 bytes

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