Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddbcb869c021463…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 14:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fd330727e19aeb4d4795864d133c9e42 SHA-1: 993ba5a363a50978e14b79cb9bc46e7ac9570bb3 SHA-256: 5ddbcb869c021463630d9e8d0c74dc5bb9558f81fc2b219e47dfea5ba8eac266
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=kedarnath+movie+download PDF link annotation
    • http://zrdb-drogbud.pl/Upload/file/limus.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/82976549230.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/30535265255.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/l9g72hqf7pom332labtcnajd6s/53743415883.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/78753493123.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/nozugekazitevigesiga.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/kv42a6pbskao1fnpr7q89mq9g0/pewesobeseginesomijel.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/50177915207.pdfIn PDF document text
    • https://sistemkabin.com/ckfinder/userfiles/files/18612756101.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/sivubepaluleriduni.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/848c1296c4e10f672691f3088130edb8/15309869007.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/94681380795.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/limunujimupupadetopebu.pdfIn PDF document text
    • https://maviet.vn/upload/files/45398302462.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/48788761270.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109101145534487.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613851c387eb2---53375974459.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/t2ib5kcpjr5pm9nkbgctm10ks7/kixukizugevova.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/64327975638.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/1375037845.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/punoku.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/ximagavisipawom.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/fosura.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/xezaladigunonifula.pdfIn PDF document text
    • http://calisnt.com/uploads/files/tizumodivov.pdfIn PDF document text
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/12629958671.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_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 17256 bytes
SHA-256: b21db43f80f81caab6fe3bc3df68efd37ddce2a31283a503619a0cdfe45465d1
font_01_sfnt_off0001129e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129E 10488 bytes
SHA-256: b6cc272d358ba37bb0098a4eb391b6c021a0a38b2a0482a620f40ac26a0bfda5
font_02_sfnt_off00012a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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