Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18c92ceb7ba0ad2…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 22:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b6d913747cf16c627d865db40f892bfa SHA-1: bac8538b58cbe3a1988cb45dfe0bee45523167c0 SHA-256: c18c92ceb7ba0ad2a93633e50578bbb48b2ba6cf3ffae2960a887b0915ef43f2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the presence of numerous unknown URLs suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://urbanelect.com/userfiles/file/vobuwikusaro.pdf In PDF document text
    • https://rovetco.com/userfiles/file/1609089469.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/nijesad.pdfIn PDF document text
    • https://anakmeong.com/contents/files/lizorifikekaz.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/10377003774.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/mejetesevax.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/mopus.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/zejosolanixumadetebos.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/35856316234.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/senedinixij.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/babagi.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/18913372046.pdfIn PDF document text
    • http://japhina.com/upload/file/wozetiniromopa.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/zivujaxitabinawugo.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210906022544469.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/fenudizageti.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/50657239978.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/93534276184.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090911032551.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/xifelukuvepobi.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/87998797796.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/47177186884.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/28266934866.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/89298100869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=minecraft+java+edition+download+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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 19004 bytes
SHA-256: 73d5aeaa2ea651ab72196821c5e2f49efe4833b28c5fbbbf5aa4e44f55b4dbaa
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 10576 bytes
SHA-256: dff17f83f592512352a2cf7a6671ee019fb37571736bf7ff96a977c78e44347d
font_02_sfnt_off0001227d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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