Malicious PDF — malware analysis report

Static analysis result for SHA-256 299f715d4aceb755…

MALICIOUS

PDF

77.1 KB Created: 2021-09-18 22:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe1c576e5ad61d50450ea1124825dac0 SHA-1: 35ee2981ec0133ecbd489b70d8fac6a189eaaee3 SHA-256: 299f715d4aceb755ba66c52f04e377629f6f22c70b2a7ce462dee43733c28c03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with 26 distinct hosts, many of which are disposable, suggesting an attempt to distribute further malicious content. One URL specifically mentions "pubg lite free winner pass hack", indicating a lure for game-related cheats. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sagarexpress.com/userfiles/file/fubibowilowide.pdf In PDF document text
    • http://myphamlulanjina.com/upload/files/xonesapa.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/nidijawonuzemum.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16141eaaf55f08---46233351983.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/8601026836145d24a0e7f0.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/28143269740.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a8eab55270c621e28966d9cc81af19e3/dezajasonorovega.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/nejizinozijalufitevawok.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/34147418262.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/49917489586.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/kusosaxofisudiw.pdfIn PDF document text
    • https://ksuskalology.com/images/file/sizarajodaveka.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/09ea5e7f7cc0c6eeb5bf3acad792ae66/fusepemokala.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/ranivol.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/sanomibugetibijetavu.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/3587753318.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/juromaxotejozodulifiwaw.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/78413390727.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/nejarapoxaxolipuw.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/56118106493.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/19115927603.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/safigajakoliponorakamezo.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/46375961196.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/gerebagerirefegav.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/52328212425.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/nenaniradizeruwonofumaguk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pubg+lite+free+winner+pass+hackPDF link annotation
    • 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_off0000c6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A5 11060 bytes
SHA-256: 807909eb30654de79af044a6c3c48492d59b596a6983ecae22c66200970e6852
font_01_sfnt_off0000e033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 18112 bytes
SHA-256: b03ea24e436da76527dceacf4347e78831d5934050f4c7458350f104d4055569

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