Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e61a8b4d673007…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 04:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 421efb4e8184847290419394014dfadc SHA-1: 58a833baf58582ded1ce3ed6d7f6ae3f34ce3bd2 SHA-256: 75e61a8b4d6730071bc94188b6530ec48df556818f7afd2fcbc2b689e7a5c1a3
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs, with a significant number hosted on disposable domains, suggesting an attempt to distribute malicious content or manipulate search engine results. The document body contains metadata related to its creation, but no direct user-facing text that would indicate a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=babbitt+sinclair+lewis+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/badaxiloru/bjbgfjb/86701318476.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/s0cVjiw/limuput.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/54971615470.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/BijkDAV/weather_forecast_new_york_today_and_tomorrow.pdfIn PDF document text
    • https://cdn.sqhk.co/xumifutave/ijuiaBW/best_romantic_ringtone_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/bZI962Z/80569108094.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/28767356454.pdfIn PDF document text
    • http://ramedefinu.getenjoyment.net/vuwelupozebe.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/eZOgjja/world_s_toughest_race_team_canada_adventure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/chlamydia_pneumoniae.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_5e42fab57a1c419fa2cce34e1eb745b5.pdf?index=trueIn PDF document text
    • http://gogujigasad.onlinewebshop.net/sample_essay_outline_mla_format.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_1f8ac3615801411ca8fec52dda405328.pdf?index=trueIn PDF document text
    • http://fazovalekotevo.onlinewebshop.net/70808484760.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_b87dc59af45f4d519261a6fbf6046d10.pdf?index=trueIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_6734c857b74a4004b2ba233cb4d16da5.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_83170aa7b9d94be5bd6d088ffccd82d9.pdf?index=trueIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_aee2ec31baa7430694dbd242b88e0e5e.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_51e811d7ab1d440283d1be16d0e5ae59.pdf?index=trueIn PDF document text
    • http://rosajeku.myartsonline.com/how_to_clean_a_trane_clean_air_effects.pdfIn PDF document text
    • http://tosurok.myartsonline.com/8644590346.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_270767a834214c09961adf666989d062.pdf?index=trueIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/89106389506.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_6616c9f260c14b5e95a4bb61d5a5c354.pdf?index=trueIn 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_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5640 bytes
SHA-256: c112939156359f1acbfeb24e0b5db959cf798a2a0323d3793af80425a258889f
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 12404 bytes
SHA-256: 5c80770c1ff7a36033bcfca6ccb94364bb6470903e4f924fecf6b0667a31ba9a

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