Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b6ae4836697255…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 08:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 275d6464a7de6e75d1ca8de47497fa1e SHA-1: 29c908361a1deaefe2a4a4deecb41faa56d860e3 SHA-256: 42b6ae483669725505a05015dd7d35bd010e9bf95a3ced1f896f7ca0ee853eec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=watch+nba+playoffs+free+on+android PDF link annotation
    • http://wienbildarchiv.com/upload_files/files/niguriwugawetunilivedod.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/vogovog.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/rixekasu.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210907170014.pdfIn PDF document text
    • http://bdsductri.com/upload/files/wigukenuvuworijamex.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e4a8ca28d---62274437747.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210916125340.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/xosum.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/37119714600.pdfIn PDF document text
    • http://ropesadventure.com/d/files/55004789965.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ede1e9531f---46988592035.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/76116441021.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/nemis.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/viputidogixararazakugonak.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614298ac6077e---mabebinumobibaxunud.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/49967330222.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/1r2ud7r4rlmvv5bjl5r01g00f3/novezeziwidijimowigu.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/20399513096.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/3075197309.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/18495989166.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109130157505391.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/75327381306.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/togipuzikuzo.pdfIn PDF document text
    • http://101balkon.ru/upload/files/litobofefaxoselepokupidik.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/68861983192.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/xaligejejowusipibu.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/bapinexizazafutapu.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_off0000d6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A6 10964 bytes
SHA-256: 7047022b7d8af16aeaaed31d04730423fedcb93a621f1db326942bcbe1f46161
font_01_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 18020 bytes
SHA-256: e28ba52bd796283f26540d868e338b543eda8aeada727dbb7f10cec0d11af788

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