Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a42d65729c42d1…

MALICIOUS

PDF

81.6 KB Created: 2021-02-11 22:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6606beb6f4c2ae30c9dd1d4c65ac1e2a SHA-1: 66a80cdc9a52bdc0d594c9d016f4bb8b5da310a6 SHA-256: 93a42d65729c42d18224f214616f7669874bfd2663e1b9e20c6a3bf961508087
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL 'https://yafferge.ru/wb?keyword=witty%20answers%20to%20are%20you%20a%20virgin' is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious classification. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=witty%20answers%20to%20are%20you%20a%20virgin In PDF document text
    • http://presentinsta.site/darbyshire_pricing_and_trading_interest_rate_derivatives8whuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/yE5hftj/spokane_superhero_fun_run_2020.pdfIn PDF document text
    • http://lifeit.pro/tabletopia_premium_kostenf4bel.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/jc5esHU/hide_seek_song_download.pdfIn PDF document text
    • http://agentsecure.space/3_ring_binder_spine_template80khs.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gnOsjby/sound_assistant_jobs_brisbane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://muzubosumewuxem.epizy.com/nursing_competency_test_questions_and_answers.pdfIn PDF document text
    • http://zabusokaruzovi.rf.gd/material_safety_data_sheet_for_international_paint.pdfIn PDF document text
    • http://woporebokut.rf.gd/39165860584.pdfIn PDF document text
    • http://kekokid.epizy.com/38785581413.pdfIn PDF document text
    • http://zewedazogiwake.rf.gd/78886803748.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/2010_aua_guidelines_bph.pdfIn PDF document text
    • http://lerivazileki.epizy.com/mathematical_induction_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/wonderwall_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/88274979008.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/libros_de_adyashanti.pdfIn PDF document text
    • http://peronilekovo.rf.gd/beyonc_formation_homecoming_live_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/gatowejoxazofuximowujujox.pdfIn PDF document text
    • http://tomedokuboder.epizy.com/50006427801.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/42981115325.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 4972 bytes
SHA-256: 0be1482fb05b86df8ead63ee2153043b57abdafaba4d17e8971430392f07b9e6
font_02_sfnt_off00010578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 11016 bytes
SHA-256: fca5c82e07dae371ad58dca83f2c462d4d0246a54640a9f5788cad22a141a3bd
font_03_sfnt_off00012ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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