Malicious PDF — malware analysis report

Static analysis result for SHA-256 48de9f5595bfb723…

MALICIOUS

PDF

65.8 KB Created: 2021-05-23 00:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73eb97b66d0aadea2f2f1f6649c90a23 SHA-1: e229cf06838cf2fc342f5842be964bffcfbdb5ee SHA-256: 48de9f5595bfb7235dc9f3dd058b442263658a7c4080f04451855dca3801aba5
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. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious domains. The presence of numerous embedded URLs, many hosted on compromised CMS platforms, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9474

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://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/cbf62c8f367eff49a74e28ebbf2ee7b2/zuporejex.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fe1a205a8---59698859027.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a49eee65c2f---baxoma.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/j8t3c0k6tta1k5bj9fh9ale3d4/bikajonu.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607978eba8f05---9859136299.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/838ee35d387f46b2d30cf82d25e73799/43090406702.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8b167399---suxuruxifirokelasuw.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/au0fh3rdmnn9ge9lsel56ukrbt/67475788216.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/8492a70bf0b727bd377ddff9b67a2660/gesaki.pdf
    • http://www.jindatunnel.com/up_files/file/75213025563.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/95bfbcb41156443c83f9eab75e405c6b/gelav.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ij2ff2j3pt10tud0ig6jbal5jh/55552871441.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074d03753b49---27336975041.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4c40282a---pivuxapaxuledagubotefeva.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/79od58jesupq5bs7ob169kfo60/juwoxato.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a358b849ebc---sovitiselibe.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b7caede46---zeloxuremukomut.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079998adb3ee---ranasufiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=my+summer+car+build+179
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7a.bin
ea8aaa8ecca9f2771dc6cb4a5ea3d629299de8a74a27c96a40cf47a12a851ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 3764 bytes
font_01_sfnt_off0000e800.bin
c9bc57cd68354cd281eb4d4097b26d0488515b78d881983ceac51bebe834e336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE800 5620 bytes

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