Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce872a37b2ebf35…

MALICIOUS

PDF

68.5 KB Created: 2021-09-28 19:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 357f434ca1dfa4b502679a69bf0d6f54 SHA-1: e411c9c2bf14e0e8ca0e442de13ddde3665521fe SHA-256: dce872a37b2ebf350d256064ca2d20e6767e133eafbbadad567f356cf5506004
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common phishing lure by presenting itself as an image, likely to obscure malicious links. The embedded JavaScript stream and numerous external URLs suggest an attempt to redirect the user to a malicious site for further exploitation or credential harvesting. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://laborke.ru/uplcv?utm_term=pricegrabber+app+for+android PDF link annotation
    • http://apart1day.ru/file/sawakuwuvobuxi.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/totupogemikefabunamoger.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210924120625.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/75991408e59462e85cd371d37e075c2b/rapukogasuze.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/89089352046.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/47749739348.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/nofaluxesagamibixow.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/89362966537.pdfIn PDF document text
    • http://52963566.com/upload/file/202109211004096823.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/zeboririzapigefi.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/rexodifupos.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/lilalopiriwetizowemire.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133d16e474be---xabizowapapugozuwokaroson.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210910231300.pdfIn PDF document text
    • http://geodez.com/pliki/file/zanadalodujemi.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109100603377733.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/verobiwojomodo.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/rokogojoxipesetibot.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/zekasasidodonub.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/68543913505.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/manasusiwuzumilon.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/xodewagiligebumuf.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_off0000af08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71A 14348 bytes
SHA-256: b3b7dc48d2010551177474a3a5271a6ec151c206f24e9a69eefb9f59a6b30f08
font_02_sfnt_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 10624 bytes
SHA-256: 0c3ed6023954cb9cecaaec81b9efe76555ad7ca3508276064eb3078951661ed2

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