Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5c5ee7ed0fb129…

MALICIOUS

PDF

111.8 KB Created: 2021-09-01 06:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05dcb6c059523be8b5a8622ff77f9b74 SHA-1: 3468a4a7df0d71c3d1d573ac0667a6b8074f6f7f SHA-256: 2c5c5ee7ed0fb129389fe9fccb4d19a74cbff34f78982bd39256d4db494a44b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple heuristics related to PDF link farms pointing to compromised CMS uploads and disposable hosting, combined with a 'download button' lure, suggests a phishing or malware distribution scheme. The embedded URLs likely serve as entry points for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://pixomot.ru/uplcv?utm_term=lol+wr+builds PDF link annotation
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/fad2ecfee47b66735777152c8bf266a9/6947401059.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/21243754296.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18d2db20d---jogitifikan.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1e2d1fb6---nevoponuzepali.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/kosefek.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/numijubozasuj.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/ruvidokikim.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/d3933abec174d947c6058e274f55e21d/87642384903.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c3e064d78---seliporom.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/kenagonerelo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aae96abeffc---kerezodulimasaduzet.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3d3cbc8d8---5517220687.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/rezamogov.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/08983qtrbr91cmhdfktbvma7j3/32865341762.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1e9118d8a---50462644504.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/89121549418.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f97be635944---fumosujizawanosaxogarot.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/66822974894.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14203657150.pdfIn PDF document text
    • http://paradigma.bg/uf/file/tugibek.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/01b0d0fd57760c0404062625b4fade5f/50938166116.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/61108502263.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/31955306093.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA9 18316 bytes
SHA-256: b086f03d6a8bd4b1f9e28958ddfdbdd6897099bcfeb0ae756954c652b3dee761
font_02_sfnt_off00019b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B32 10028 bytes
SHA-256: 27ede7c1b0b8cedb3c671585018c7a57ac95d5dd2fbe83bec91dbe34a7fb6ebf

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