Malicious PDF — malware analysis report

Static analysis result for SHA-256 c489083cc3b0a51b…

MALICIOUS

PDF

69.4 KB Created: 2021-09-29 11:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8107379542fd2d82d069d55a7e3ddaf8 SHA-1: c99509918358c5337a1e874e53b3ce9775ed5b4a SHA-256: c489083cc3b0a51be75f54149fda48a06b50da8a34a0646f659a0dd67bf85a72
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to PDF files on various domains, suggests a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/nujuvemugisedowofakoko.pdf In PDF document text
    • http://ozhelalikram.de/resimler/files/64632798107.pdfIn PDF document text
    • http://kp-bs.ru/upload/files/95396170176.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/95481011463.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/5633980266.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210928110859.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/91701708217.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210919_15BA91E8F3845EE2.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/bowomexomatofemabolaxivex.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/84786621136.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/jutizijemixivob.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/lazuxojim.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151636e91daf---lagogurofugivatugugir.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/30934667212.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/671b5ddc59031b9bad6af4a79b964d79/17366561892.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/5827965075.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/59505422145.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/81722330481.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/tovagomali.pdfIn PDF document text
    • http://jn-zhsc.com/upload/gigobolilapesewix.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1632193483bobikixavuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=body+measurement+tracker+app+androidPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF44 15276 bytes
SHA-256: e77475379b88d3e58d5fc171f3752bbc3de58bc209cba7eed8e03e4fa50ecd52
font_01_sfnt_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 10988 bytes
SHA-256: 4d1b2d5c680328b2fc78c35291270caf396338a24d5e9024306ad81b087a13e1

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