Malicious PDF — malware analysis report

Static analysis result for SHA-256 922a51d49f272415…

MALICIOUS

PDF

62.6 KB Created: 2021-05-09 12:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568f288f9d838a6b103772a063c082bd SHA-1: 544aa505e5c45df897f23e086358e5697c0546e7 SHA-256: 922a51d49f272415802b56c871d4e76b970d72ff169afe2e39b26e2ad1fb2894
154 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, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, suggesting it's used to redirect users to phishing or malware-hosting pages. The presence of multiple links on disposable hosting and the use of 'utm_term' parameters further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

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://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/lpvvuo7ftm4itqpmsq0l96e9j0/99727976606.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/929ee38ac796d6efe50a0d1ae083dbc9/99631238055.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/89d40f54d3ddd810a134a4dee880c3a6/25272877502.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/dqh0qdtcpo1oglcb2l9vmq860g/72230075436.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/08fas1qokhtq7cehf9d16qnfpp/pafuvukuverali.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/trvsm4h6ouqsj5deom7p01vdln/15022102433.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/5c31fede8ad5f3d9de475a66a53e0af4/waregalavizusigidud.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844d13a0128---86155841572.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d62b80e5c---kabubozi.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/4a033598167881882b7726695af78f80/6445652519.pdf
    • http://alnoorcity.com/userfiles/file/notuvewapiw.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/62640b5b4ed737acf0b6401e219d9343/nesarepozifozo.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e2555490---pugej.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca757c5cb---gosenoli.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/178286b9e7e8fddf816e91a4acc262f8/degasutaxisogavivagiromo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sample+cover+letter+for+resume+template
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceca.bin
ecabde420c621fc70aa29624780476e9a2bdb0c6c24cbf50eef73a3e9644008e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.