Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3250ab90880538e…

MALICIOUS

PDF

87.5 KB Created: 2021-09-19 16:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6cdf09ace9b242e1b272f8c01d515697 SHA-1: 9171536851c7687b0fec6e379a2f418d29e479c8 SHA-256: e3250ab90880538ed71c0cd30722482c4edf9ad279f1e93bedeb2ab11a74dde5
142 Risk Score

Malware Insights

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

This PDF was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm with numerous URLs, many of which are hosted on potentially disposable domains, suggesting a phishing or malware distribution attempt. The presence of urgency and download button lures further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b9090fe995357de51c3c2d8912544935/39914258198.pdf In PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/xutazizunis.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/83136822831.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/15877428552.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/buremi.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/juvabijuregoxoxufojusopoj.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/471253498.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zabujufopobapisebe.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/af5a6caf734195c940f95246a193844a/55269724223.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/14894056463.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/47571247005.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/26141569858.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/gigekonimowa.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/xapumi.pdfIn PDF document text
    • https://titishop.co/upload/files/59971646219.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/17213901381.pdfIn PDF document text
    • http://novafish.it/userfiles/files/leriwunomo.pdfIn PDF document text
    • http://contelex.it/userfiles/files/1601452217.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/35078033333.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/defisej.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/83137201586.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/pokalanetunez.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/33403091894.pdfIn PDF document text
    • https://posh.hr/files/lalusixuzupilorizo.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/gemilizorowuwamedivujodol.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/20261042851.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/bogaligavatugi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=stories+insta+saverPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 10196 bytes
SHA-256: dfac0e954696f5bf1179e52e0f02c2ce413ac505a480664a004dd5e547092621
font_01_sfnt_off0000f1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_03_sfnt_off0001209b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209B 18212 bytes
SHA-256: 970f2428c7a6c8282f14c6505fa282e93aa8955fac6761555da7c3bde71e3d49

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