Malicious PDF — malware analysis report

Static analysis result for SHA-256 700635677865c320…

MALICIOUS

PDF

80.7 KB Created: 2021-03-09 12:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2fc9e543bce5c55439797dd98baace04 SHA-1: 6cdd4b39d4a70ad157301805141392b7fa809988 SHA-256: 700635677865c320cdd3e0efe36ee1b0a967f0f0d946ca2bc51612fe6b1e134f
126 Risk Score

Malware Insights

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

This PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URIs, 'https://midufefew.ru/wix?keyword=isef+2020+rules', is likely intended to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the presence of numerous external links indicates a strong intent to redirect the user away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://midufefew.ru/wix?keyword=isef+2020+rules PDF link annotation
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/f66c2f8.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/jamijidabi-jibomalurez.pdfIn PDF document text
    • https://nugasoxitobaj.weebly.com/uploads/1/3/2/7/132710773/3048310.pdfIn PDF document text
    • https://gusizamavuva.weebly.com/uploads/1/3/4/6/134629738/d901ed37.pdfIn PDF document text
    • http://loberas.22web.org/kannada_a_video_song.pdfIn PDF document text
    • https://dibulikari.weebly.com/uploads/1/3/4/2/134235408/434d0b.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/6e841d4223.pdfIn PDF document text
    • http://gagafelame.22web.org/arpeggios_from_hell_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebafuvevejol.epizy.com/convert_into_dwg_in_autocad_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe9b61c-8726-412e-af08-2ddaa297873c/late_night_bars_downtown_atlanta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154d4d43-35b6-49ba-86f2-00fd4649b22b/damanob.pdfIn PDF document text
    • http://nolagevupuxuje.epizy.com/43126051351.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/38533350084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb18a90-686e-4940-9048-dd05630f45cc/dd_3.5_mastering_the_malconvoker.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/apa_format_reference_with_multiple_authors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/005780ea-5cfc-4313-b03c-8e930f1d21f1/orbit_sprinkler_timer_manual_operation.pdfIn PDF document text
    • http://kebawobokatole.rf.gd/greek_goddess_names_that_start_with_c.pdfIn PDF document text
    • http://doledakejopoted.rf.gd/sql_cookbook_by_anthony_molinaro.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/homeland_episode_guide_season_8.pdfIn PDF document text
    • http://kewumexor.epizy.com/subizegajejijejorutopoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c67f4e-bdf5-4871-b6d8-b73504571348/gipegun.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_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 4764 bytes
SHA-256: 0e2de08c353e6b2d65a9134960a953fc88d1288375283008ea29a3608ed9f3fe
font_01_sfnt_off0001125e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 10260 bytes
SHA-256: 8828df3658ce045a6220b8f6126e0f34d7771daebdd1b1436d32d2b10d5b518e

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