Malicious PDF — malware analysis report

Static analysis result for SHA-256 e571e54605d6268a…

MALICIOUS

PDF

68.9 KB Created: 2021-03-31 00:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de079ac741b25a8d718ae0b797546bbe SHA-1: a70585d5ea2ab892b39740db33d04f861d74c4b5 SHA-256: e571e54605d6268ac0db92a4d1bc41cc581653583377c4e811af3fdc1a3ba508
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, appears to contain metadata related to the URL's keyword, suggesting a content-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=cowboy+gun+belt+costume
    • https://cdn-cms.f-static.net/uploads/4370054/normal_601be6f5f36cb.pdf
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/e14dd568392397f.pdf
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fcbf91adce83.pdf
    • https://cdn.sqhk.co/bujugasefoli/fpgjjeR/dream_club_near_me.pdf
    • https://pawawejovotete.weebly.com/uploads/1/3/2/8/132814611/fimapifu.pdf
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/lipavazakuf.pdf
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/xawepapem.pdf
    • https://cdn.sqhk.co/nakunadubux/iiifUia/remukebazekusonafaxaw.pdf
    • https://cdn-cms.f-static.net/uploads/4482847/normal_5fd368d5ce553.pdf
    • https://cdn-cms.f-static.net/uploads/4478664/normal_5fd33588d7881.pdf
    • http://gadifurewurol.22web.org/oracle_pl_sql_interview_questions.pdf
    • https://cdn.sqhk.co/vufuvevu/gcfNgi7/kukanaxagixinij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mibiwivanetuj/zusezuzadesuxezu.pdf
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_aba7ef93028c47118ae74d0d17631c12.pdf?index=true
    • https://s3.amazonaws.com/ninazarila/wedding_invitation_templates_free_editable.pdf
    • https://s3.amazonaws.com/feliso/cast_of_all_the_bright_places_on_netflix.pdf
    • http://relufojexoxokaz.epizy.com/somis.pdf
    • http://zarelaxa.rf.gd/jeripetagaropunuxaxipon.pdf
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_336b0eab1aec4ac284951803817e351b.pdf?index=true
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_a2dd8c697f384b50bd477ae8ed4f44e2.pdf?index=true
    • http://gudagugagazof.rf.gd/98856891380.pdf
    • https://1df32be7-5e6a-491e-80e4-5c558052ef26.filesusr.com/ugd/e02e08_f0d896c37d3c4085b648e822232cbe37.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6d.bin
fbe3e8db26c058157a22baa33812b8a67f245595d014c499c87ed89be18ea10f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 5052 bytes
font_01_sfnt_off0000e0af.bin
c816cb3fe0c089537195f7c2c09cf9ef486b63e659a4b8480e452928d67d357d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 10980 bytes