Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9e00413ca82cda…

MALICIOUS

PDF

58.4 KB Created: 2021-05-05 00:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42f100fc51b13be5bffc602d3f73788 SHA-1: 49d373d80cec537b05d70d9cc82a32c73a8545b3 SHA-256: fa9e00413ca82cda3240535476626b19790cef6430b5b533ff503dce896e1232
154 Risk Score

Malware Insights

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

The 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, with many embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. This suggests the PDF is likely used to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9637

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 http://alexlunacoach.com/img/editor/file/8488946097.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/1kvs9ca8nnciopgpmlu5nkb8hs/61950367829.pdf
    • http://allaboutdowney.com/userimages/dijajelunarumum.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ukbe96e9o5u2g9pevqrj02hh0t/49030428019.pdf
    • http://www.anjhimayath.com/upload/file/zusetulopusovokidefobunob.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ddd0e0a3d9---82842022304.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/b3cb0f86aa43bc62b95577a11f7ced38/nesineke.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/58c3c99775ec08f65671199b5769dcd5/miramafuxepaluruwikamus.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/83486671234.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a27bc3fc---85028578549.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90e041f5b---famokaxotusu.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/0e5eb9dce87d07308824f6d38cca9c38/momipibafibesolowewunu.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/360601109cf5b49747567db609decfdf/sazuvidewelali.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/c7f220fa5b3d46fa6061bf2d2ef6a7d7/8568027972.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/s5kst47nnedjcbbalb7rk4jipu/85558235742.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd276e47becd31423d33a7f1d37fc705/52183499162.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608715759bc6f---71981707081.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=rename+application+package+name+android+studio
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c3.bin
5effc5fcfe4d82790caa2baa14985bf01c05d77a96f0b00ae987422b0d4b6033		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 5464 bytes

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