Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba612bdac9389127…

MALICIOUS

PDF

80.5 KB Created: 2021-09-16 04:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 73ba7dcf35c8cd04d5ddd3f7e2aff212 SHA-1: 801027d6a530d1b4af9a5f475d83cdf47e869f8f SHA-256: ba612bdac9389127cc8ea7d248014a3a488caabb2aa01a9f2d57bf01f3566ddd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://huntic.ru/uplcv?utm_term=unicorn+run+mod+apk PDF link annotation
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140acd0300c6---mujudu.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/3668511056.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/zavawegazibar.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/86391500390.pdfIn PDF document text
    • http://a-pluset.com/userfiles/95470402848.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/91989286576.pdfIn PDF document text
    • https://maviet.vn/upload/files/66750246080.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/gogomonetomixolirajuwu.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/nafanapebikagigip.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/tazixowam.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/wuwodofew.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/92327801280.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/lorajulasotodogosi.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/xotobepa.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/609440053.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/wiwekewewi.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/nekidisijamok.pdfIn PDF document text
    • http://cke.hk/userfiles/80155757738.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613e6cf00e450.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/zanuta.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/xiluzowumusekozigedufuju.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/kugalam.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_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 18540 bytes
SHA-256: 9a073b02c26041c79a4e0a0a31fb96fa79b229b221f7d30f17b58ef31fb34526
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 10432 bytes
SHA-256: 0becd59313d1422963867497e7288ae7537ab2a66a0d4753485f5921b7346ae3
font_02_sfnt_off00011c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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