Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd00ffd84d4f511c…

MALICIOUS

PDF

77.3 KB Created: 2021-09-27 22:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0ca59e3e2418f4c9705377baeb945096 SHA-1: a53a10e3901d8758f1426f2784a71acc47144032 SHA-256: fd00ffd84d4f511c0f2649ccd363109ccf2a1f2ece47f4c594b26b1ca5ad3c4e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also includes numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=winner+soccer+evolution+apk PDF link annotation
    • http://glamour-nsk.ru/ckfinder/userfiles/files/41398486822.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/kizomezuwubo.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/4260006009.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/seregotebif.pdfIn PDF document text
    • https://sinarwaja.com/account/files/sulukijusepuxumopitije.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/vabezepogotetadoku.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/tikemixokave.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/juzomuludonore.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/e032049dff687571504e01dc6506ecf8/29575049085.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/fegisalagurapugitoraje.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/64246059986.pdfIn PDF document text
    • http://stonebreaker.at/ginatejurizokexuzow.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/62718725668.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/vasizubovumaraxodafeb.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/72043147495.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/fiwomasutubabajepojevagun.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021924731259952.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/18854204806.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/fukav.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/68926406235.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/57573317608.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/24121047728.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_off0000c16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16F 20808 bytes
SHA-256: bd76da93f55d003f47791113b0ca105b4c1ddede934d725c74381803b0ce900c
font_01_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4E 10616 bytes
SHA-256: 2ee49a3b7b1fd32b49be35baf3f2407abc7c11f5fb924bc6145348e33600dc63

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