Malicious PDF — malware analysis report

Static analysis result for SHA-256 db946fbb42a06eb2…

MALICIOUS

PDF

79.9 KB Created: 2021-09-18 21:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3bd8213372577247ed6dfa54bcb61d53 SHA-1: aa8535e1131436c809405246b12d821106efc884 SHA-256: db946fbb42a06eb242ddb18fcf47cd9bfb094468005fa819bdf01b1e82d4eadd
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, indicating a malicious intent to redirect the user. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests the document is designed to trick users into downloading a password-protected archive, likely containing a secondary payload. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pistant.ru/uplcv?utm_term=hide+my+root+app PDF link annotation
    • https://shunnasato.com/34232345562.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/vajixewixorokozazaliwo.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/pupedimige.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/vesebabenofenu.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/99747603659.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/60978568263.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/10091289698.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/70657062198.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/zatirorune.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/lofedibugulawijunexorezej.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/nuwavorasi.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090509360321620.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/juvazimubeteme.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210911131503.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/tiguliduvafexubuvuw.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/65822204455.pdfIn PDF document text
    • http://beijingteye.com/upload/files/59301324967.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/76138113682.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/13067509106.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/zamixeriwarefonozudabowek.pdfIn PDF document text
    • http://4darchitecture.org/img/all/japuremoxaluvo.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/408125166.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_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 10340 bytes
SHA-256: 22a4ad5ec9c5846d1e9fdbffab408c7c360490c5f924823568377be3552139ed
font_02_sfnt_off00010319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 18260 bytes
SHA-256: 1a4e344384f8b5653d9eb5db874261d1e5bf570dee43fa2af157bd2294d76097

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