Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c54af83e7ccda58…

MALICIOUS

PDF

72.0 KB Created: 2021-05-02 14:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ac274d2f57ea35d7702405bafadeec SHA-1: cf0d4932bd10b1174b1fbdc0a34fb45a1a6c8149 SHA-256: 0c54af83e7ccda58d187677c056377a337c52184e722e79f5a738f675eb9cc5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9536

Heuristics 5

  • 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
  • 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://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c90a7ce352---8962346310.pdf
    • http://aucoindeshalles.fr/menu/file/zixulogawofuwomafulij.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a3d1282635ad5de0dec9dfe953b6eacf/kejupivedaxuzol.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcb67ea58---87734083310.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3cabbedc---kotenaborofepel.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/e4omkfurf9nb5fhlgq7fpqlm2o/8303378235.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/92mrunm3uu2g8slca5qt6ffqg4/minonezirosuveg.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160812c62404ce---pogejuwemikupuwopaxaje.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607295cdd75ab---mefuninader.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/10khs7604058hrgb16qre1l361/wolagamewogutakuwobeg.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0062d4597f01b88ed609232d1b08089d/sazuvijiw.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/284tkiqvfn9g6jc3s1a792tdobobofs4/46853999870.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160807429d6b52---5842367317.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e2693b62---gulujizeweni.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707d39761bc---3343842661.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd768edaf1---93138421240.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/29ace300affe996936a2e0f42230fcb3/gudebavaxexolovixuzoperud.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25979680c---99837110439.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608043e2a806b---poxapuduxugezawasek.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072224bf227f---jezojanerenisivaranuribi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=manualidades+con+papel+mache+cuadros
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacc.bin
f37aa135940e5c4559ad1c5c9ff8aa4620f876c6f7eeba09555c36041ab58552
pdf-font-stream PDF embedded font (sfnt) at offset 0xDACC 5120 bytes
font_01_sfnt_off0000ebf5.bin
f439032d6f972457c7f50d014a58086339ac2030d93fd4b1d063bfd16565dff8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 12948 bytes
font_02_sfnt_off000113fa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 4324 bytes