Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b32a45f777af8e1…

MALICIOUS

PDF

78.3 KB Created: 2021-09-21 19:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4519702a8cbf6438628da51e45c8c958 SHA-1: 6f44461110715a2a0473a72cabb978fcc52f3acd SHA-256: 9b32a45f777af8e1b3ca1478235c82f5244796d98d63762f3599ed697b66bd32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'queure.ru', which is likely part of a phishing campaign. The PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, potentially for credential theft or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=tom+and+jerry+game+old+version PDF link annotation
    • http://abwsalisbury.com/uploads/files/sumupujejamemodugefazoli.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/16838982371.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/worenavomudoketatejis.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492f98e387a---sumelatativimunadun.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149107b5248b---42376628326.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/73073011222.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/jigilaforodotanaxoves.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/pokogukegirasuxanikukesix.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/pugafanuvinatefo.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/zamede.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/658682243.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/43911202995.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/goropodipugapudopub.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/zemeza.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/51377492370.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/xedemizagowemapo.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/wajax.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/55198909301.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/papejedakoxolekutisifo.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/ravizo.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210909134506.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/17532610386133487a17332.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/najap.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/zaparurebidirowufirojuxeb.pdfIn PDF document text
    • http://guowangcable.com/d/files/48969633622.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109082330074409.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_off0000cbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 17872 bytes
SHA-256: 8024a46e22dd72d69830331f0324b9ef1c69d0951ce591df7600daa8b0e91ffc
font_02_sfnt_off000112f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F5 10764 bytes
SHA-256: ed266f9756554bfc7d54372b5f6dade4cb3ecfd863a53de407ce13a1a6576bee