Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61967bceaff6020…

MALICIOUS

PDF

91.8 KB Created: 2021-03-01 00:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3a9488ba35bb94284148aea4b24cc05d SHA-1: e5effc4818b59fa433adcbe2c2fd15990ffb3c44 SHA-256: c61967bceaff602053b0a0c37a356ce742aaedd26a9119affaea60ddbfad3ad9
126 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, specifically as a phishing trojan. It contains numerous external URLs, indicating a link farm designed to redirect users to potentially malicious websites. The PDF structure and embedded content suggest an attempt to disguise malicious activity, likely involving social engineering to trick users into visiting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=distressed+debt+analysis+strategies+for+speculative+investors+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fc6514e53ba5.pdfIn PDF document text
    • http://boost-store.net/dolozuryzzo4.pdfIn PDF document text
    • http://sezituza.66ghz.com/electrical_certificate_of_compliance_template_south_africa.pdfIn PDF document text
    • https://vulazijol.weebly.com/uploads/1/3/4/6/134648863/foxexi-vewututejopuzu.pdfIn PDF document text
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/bf42e43c4b97cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_6000db959263b.pdfIn PDF document text
    • http://qwertyujg.xyz/bevotopesoxajukofox7xmdr.pdfIn PDF document text
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/bovelakimeta-nexeg.pdfIn PDF document text
    • http://gloslides.com/the_masque_of_the_red_death_prince_prospero_quotesegm1c.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/sijupefo-baluxopokepagop-palukozekuk-gifitimuto.pdfIn PDF document text
    • http://giocodigital.website/vuzemokijunumavof8i1a2.pdfIn PDF document text
    • http://gefejisu.22web.org/dinesh_chemistry_class_9_free.pdfIn PDF document text
    • https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/8258817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405419/normal_5febe6072a4ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_602e2572a1eb6.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/ca4f79c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_603bc2819ac64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonasekofuxix.rf.gd/bodyfit_by_sports_authority_exercise_bike.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00011095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 5716 bytes
SHA-256: 9c9fbba700dde3d07805c7d3e91fef72eee7ec0a586d7ca00311a1e33b5b64cf
font_02_sfnt_off0001243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 11012 bytes
SHA-256: a30cfdbf2f0e05bfebc0923a0e88a4427725f39b2ff6b189ea18ecab53c51441
font_03_sfnt_off00014a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A11 16328 bytes
SHA-256: c4483d0a2685d558df97df6ba840746f2870e6254d6d5d8edd69700eac20a654