Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9602bee9725c718…

MALICIOUS

PDF

86.2 KB Created: 2021-09-16 12:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8522670f2fea76a4e34c4b4ab1bb57e4 SHA-1: ccf230928b32ecc2cf9cfbe49a8126aea146a837 SHA-256: d9602bee9725c718412a4a35f70faddd445729614a2e61030eb119ebf7533929
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user to potentially harmful websites. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. The presence of urgency language further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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://archism.ru/uplcv?utm_term=guru+full+movie+download PDF link annotation
    • http://hbtsap.com/Upfiles/news/file///joforufexunejerugoxep.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/madawudavinutemim.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/zovoxosanuwigutumuvamux.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/padidebeni.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/47439486541.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/84878618793.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/xadudedivotufejedurami.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/55030314535.pdfIn PDF document text
    • http://ausafe.net/images/art/files/zawexagatimulizu.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/21114607598.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/6181900858.pdfIn PDF document text
    • http://elitacasa.it/images/file/gojowobukujidumojigakitu.pdfIn PDF document text
    • http://schokozentrale.de/idata/66921833572.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/32461862728.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/rekorotugovume.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/jafikirimup.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/bekogow.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/2030811077.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/sefebitaxebuwi.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/072054032709.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/18962505100.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/8166368559.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_off0000ea83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 18600 bytes
SHA-256: 2fe4ef2a76fb79b3c56be131fd8ce1f6e4b78c9d2f96aa4067cdae2550e15e66
font_01_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 10540 bytes
SHA-256: e8db947e50618c5185f7499cf96ec93dea1d57c4377f7bf4bc53bf04b6007d47
font_02_sfnt_off0001332d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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