Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce14500d31d169d…

MALICIOUS

PDF

76.4 KB Created: 2021-03-24 05:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 07eebe9e61bcaebb88138d07e7825f21 SHA-1: 6e1ed9c1c0d04b1cd9b03b421bf59c32c38b6282 SHA-256: 1ce14500d31d169de0c210a7e07d68196e1c3d679c5d5665fbf8febc863190f9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=bitlife+prison+escape+guide+7x8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423728/normal_5fcb39329b4cb.pdfIn PDF document text
    • http://vivadoctor.ru/misd_course_description_guideflv8f.pdfIn PDF document text
    • http://keto-menu.online/38115929568xgpe7.pdfIn PDF document text
    • http://arendaavto.taxi/garmin_55lmt_manualw2b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_602371c53cf7b.pdfIn PDF document text
    • http://car-test.pro/aashto_t_99bkfa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5fd787cf95082.pdfIn PDF document text
    • http://myluckywin.site/rpg_maker_vx_ace_lite_crackvw2jp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fcc0262879b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_603474df544fd.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/nanostation_m2_firmware_xm.v5.5.6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_5fe3e15337893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_39a65ca2c1da431a9a797fa16a437870.pdf?index=trueIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_8e86d48546354b52a02340ca157d4c9a.pdf?index=trueIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_85ad9216cb5c42d6b242ff87e256a6f4.pdf?index=trueIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_6cc00d5bdee74b40b8b1b04c2db3c49a.pdf?index=trueIn PDF document text
    • http://misanedajog.myartsonline.com/fly_tying_desk_organization.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 5716 bytes
SHA-256: b1b3e90c8866160c81f5aa506295081b8413368865253955e2cc43b882466eb3
font_01_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 10552 bytes
SHA-256: d9cf0d4daaf75d43f36c85e8181fd136f18722a0f79f87ccebaae9ba6a4ca659

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