Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf84150bb91f1123…

MALICIOUS

PDF

112.6 KB Created: 2021-07-14 08:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 46caf11235c33124a9079c4f3b7cfba9 SHA-1: 1c059f4b63de19132f53d4bea1effcd1a4c606ea SHA-256: bf84150bb91f11238934c108d02886125cb7a892dc29ca84884ab0a8b43d6179
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests a lure document designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://botosani.ro/img/uploads/file/sakepijufusodavarezota.pdf In PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/109e4cd1d3b824e7f85770f56df54914/rikek.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160871e4272ae4---jemadizewavuj.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/muledanirosasuz.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce71d193fee---bevebotuwebuwijaw.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/72036776481.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/b6d601f92e064b4632dac48d9fbbdb00/76245516408.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607161934f146---39377761981.pdfIn PDF document text
    • http://stfrancisfrankford.com/clients/9/90/9051900d87e3fdd5bc97eff612ac54c4/File/67525907569.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ijiurkil0a5ujdg78h57m4op13/88540105021.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c035ce47---dixudujozodorowonut.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/5145518eba701e63b96d06df66902053/zapunitarifipugogafi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1326d2a7c---82845281236.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087105a95c59---15099357716.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5065b43aa74a14c8f4ddf2dfa5be7f3c/86662465210.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/80270087067.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3fbc4db28---67048507286.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba181ec2df---4049459988.pdfIn PDF document text
    • https://csodamalom.hu/files/files/27341579488.pdfIn PDF document text
    • http://npas.ru/pic/file/36365244342.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c125504ca88---33163708136.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/09c0626b74bd3136ce4264b67256b322/gixanuwodopugalinoto.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094af5d862f2---wadepazuwokimozupubidel.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/66692921740.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/6b4caf762ea24549955eda0f300a906e/62793573854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=idle+heroes+4th+anniversary+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 10796 bytes
SHA-256: 259450e8d2938efc7f3b62b04b5d658bbbb40846bd3be144219f2f1bcd9adaf3
font_01_sfnt_off00014cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAE 18128 bytes
SHA-256: 6de82c175e75eba29d88280649048a178c4178c370736e0840f95c60f7f71260
font_02_sfnt_off00017c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19495 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
font_04_sfnt_off00019ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CEB 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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