Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb613caadb658b81…

MALICIOUS

PDF

88.2 KB Created: 2021-06-07 04:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0eafa66e847556d24d4d9156c7fb1cb7 SHA-1: 6a28b9bb61a7c069ddf297ac6d257ad2212bf6cd SHA-256: eb613caadb658b813818b7eb9e559f1c53533e979b94e62746b83a3742b1b2c9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm and a potential invoice lure. The embedded URL points to a suspicious domain, likely serving as a redirect to malicious content. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://oniceh.ru/pbw?utm_term=building+materials+and+construction+solutions+revenue PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fcf12454735a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_60491dd684b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_60221860d693a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_6065defb71b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6042c3fea08d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fffdd4f006ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_60bcfb693e3dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_603459c9980de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_604181dc3b212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482625/normal_60bb8087add20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_60104a819153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_6063be999b942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mibegenav.pbworks.com/f/zajafonijuri.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144595617/dulekobaz.pdfIn PDF document text
    • http://xefobukeza.pbworks.com/f/famoxed.pdfIn PDF document text
    • http://nibenaxibot.pbworks.com/f/rowove.pdfIn PDF document text
    • http://zilebunod.pbworks.com/w/file/fetch/144686160/filajazajodebi.pdfIn PDF document text
    • http://fezosubi.pbworks.com/f/how_to_uninstall_best_free_keylogger.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144750675/saxon_math_course_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5262948d-ec55-43c8-a630-f2ba729de7ac/prentice_hall_gold_algebra_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f3ffb3-6230-458e-af71-7eb17e621f38/how_much_is_one_krispy_kreme_donut.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/vendor_ageing_report_in_sap_abap.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144419067/sixeloxusukeviju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbc4f9b-5b68-4c8f-b67e-e977b5009517/newborn_checklist_singapore.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144466152/kuttymovies_net_2016_tamil_movies_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0dd97f-4017-4db8-858b-e05ae73753e5/what_is_the_value_of_the_bond_angles_in_coh2.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 5252 bytes
SHA-256: e47599e96a422ca1004305c7482c80d517e5bf8f54448ece991b6a9cb61e005a
font_01_sfnt_off00011e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E16 11372 bytes
SHA-256: 80cb87e23118d2316650f335178f37271f428ab554ff6429c001ddbc02ea20e5
font_02_sfnt_off0001444e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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