Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b270ae436b4a2d1…

MALICIOUS

PDF

59.8 KB Created: 2021-05-24 17:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cffdccf7ac82ee2850a1638bd8fb9c2 SHA-1: 70301ee4da807c3135394b98c8016836799891e1 SHA-256: 8b270ae436b4a2d1261a71710c2824d7721b5bc085370e4b96998267724e2b1c
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, specifically targeting the 'formcraft' and 'super-forms' plugins for file uploads. These links likely serve as a distribution point for malicious content, as indicated by the ClamAV detection and ML classifier flagging. The document body, though garbled, suggests a lure related to 'parabolic motion', which is likely a deceptive pretext to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec02d868a---2645220120.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a60994550a8---10624473431.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7be6677cb---rimebowinaxomi.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607426ee28da1---43856799972.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/ik447nsrm34lkpqok4qc4rbsh3/1557473616.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607356bcbdf95---somupopotarigatowufat.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/banuduvano.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ca1bcbd44995f7c534609baa2e70a963/9934808692.pdf
    • http://agcslohian.com/userfiles/file/46643697049.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6u6l9c3rhufh0favj3aah2hhs3/vibugaxisa.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913c5d77a20---batefixibenalajerizutale.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf90471792---88307267253.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b92385142---55075334272.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a7631c32fe57c7be866124036577910e/tavafifotu.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a06978843f5454b09095cc92d3e51edb/kolazej.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db0c3982b6---28496998706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ejemplos+del+movimiento+parab%25C3%25B3lico+en+la+vida+cotidiana
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce85.bin
468f9a1cb5676cec9448788aa6c9b1f7b971c2fa25aaf791b39677b1846f93ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 5588 bytes

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