Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7be2d97bc6d4384…

MALICIOUS

PDF

85.3 KB Created: 2021-09-17 00:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c6ce694bc0a769f78e98111a79f3a55 SHA-1: d7e24b233a7fc81a00f353b32ae886aa042d6b2f SHA-256: a7be2d97bc6d4384b322826f5c639242f9832f886d328eb1866587a07fcc3334
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple external URLs, some of which host further PDF files, suggesting a multi-stage download or phishing attempt. The presence of a visual download button lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=warren+wiersbe+ot+commentary+pdf PDF link annotation
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/meberux.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3fbc71bae---bibinijijobibademivigosi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161402bb310e93---648887010.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/862bf2c0e14dcd0c4904a29c3ef03640/83518902898.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/21839694475.pdfIn PDF document text
    • http://fohow77.ru/upload/file/56887018227.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/luvosavutoxugejatiratu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/28408250164.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/41108719630.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/98128657376.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/7907270178.pdfIn PDF document text
    • http://ladna.pl/user_images/file/vuzeronejimabixagovaxixe.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/13563825997.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/64929144459.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/rubugaxisizukitovarika.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/56101604240.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/96413542744.pdfIn PDF document text
    • http://klhl.com/userfiles/file/94653413539.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/tupedoxinefepufibilaxifod.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/zubojufudap.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/a4b6646881c307d1c8735f2488e87a1b/badorikiva.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/38402476579.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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 19016 bytes
SHA-256: 56dd45d9e5d3f86a1fa3c6dc7d3130c4185194beef48043b12bdc26f727a630c
font_01_sfnt_off00011606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11606 11068 bytes
SHA-256: 8a8cb4d21f16be582a184b8d163a09920cf02f9a3710ce07d9870f75f0a59c55
font_02_sfnt_off00012faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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