Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba52fc7500bfab2…

MALICIOUS

PDF

76.4 KB Created: 2021-09-13 22:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c0c7a24b3ae6bc8e4606dfa78c00e371 SHA-1: 8e0724c4c5e9ba4e66864a1b4aa924e9b4c15ff3 SHA-256: fba52fc7500bfab21f6a17cadf869b2ea66ea9c8b7be3adb3d26a389bdf1797f
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and an ML classifier, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or redirection scheme. The presence of these links and the overall detection as a trojan indicate an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://smidgel.ru/uplcv?utm_term=windows+7+highly+compressed PDF link annotation
    • http://smenergy.kr/uploaded/file/1692319151613c760c6ab2a.pdfIn PDF document text
    • http://quranday.org/userfiles/file/daxuvugekudekabakakixu.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tulazelube.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e52a7f3c85---risekoseninobina.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/botivoregemug.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/kebozuvidebe.pdfIn PDF document text
    • http://momsystem.ru/public/file/gudanasurawixu.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/ximinakidu.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/vufudogepekikavazanop.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/94764565425.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/wimalinetugoperipilufimu.pdfIn PDF document text
    • http://rld-carbon.ru/file/9550869398.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/tililuruxi.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea7446344c---fozubufujexefatojelafajez.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/33666456273.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed8e25cb37---80233860820.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/polixawufuratigorapire.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/08d6abe8035ac2632f27871a2c8f4af1/55743404626.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/dinib.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/26685679497.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/59242575846.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/rijojok.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/ragedobopitur.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_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 10944 bytes
SHA-256: 4e7059a574c299f34c9f756ba19d899428a62244f5ffa2be1d1f6a451ce70b6e
font_01_sfnt_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 17936 bytes
SHA-256: 7e52be3aa6f2c4e22ac905374c7f8db92593e83681f1d5af0dcdf9060524b212
font_02_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.