Malicious PDF — malware analysis report

Static analysis result for SHA-256 271a880425ba165f…

MALICIOUS

PDF

95.7 KB Created: 2021-03-15 01:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 019c71aeb7d32623266b8b0e766d228d SHA-1: 7a65e4f56a82da6c8c38e87cb780cdf252c90062 SHA-256: 271a880425ba165ff75693bdc4fc445f9aba278d2e34e710f0858bcb7ce75f30
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used to host a malicious payload or redirect to a phishing site. The document body, though partially corrupted, contains text related to the URI, suggesting a lure to engage the user. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/strik?utm_term=why+did+michael+corleone+change PDF link annotation
    • http://faguduni.22web.org/87317735385.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/davuvazafa.pdfIn PDF document text
    • http://idealslimitaly.site/what_is_the_unit_of_ratedualj.pdfIn PDF document text
    • http://habercigo.com/iso_14001_internal_audit_checklist0hbiv.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/harley_davidson_25000_mile_service_cost.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/jusiw.pdfIn PDF document text
    • http://saudiautoinsurance.com/how_do_i_connect_my_bluetooth_adapter_to_my_samsung_smart_tvnwu90.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/pandemic_a_g_riddle.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
    • https://s3.amazonaws.com/daselex/rexaxezojuvolipuxaxewukop.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/icloud_photo_library_to_iphone.pdfIn PDF document text
    • http://bizosubage.rf.gd/hunchback_of_notre_dame_esmeralda_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/leter.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/15539376122.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/best_cv_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/how_to_draw_step_by_step_easy_pokemon.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/clicker_heroes_ancients_guide_idle.pdfIn PDF document text
    • http://gubadif.myartsonline.com/73692661867.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/xuvogivawanoku.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/4_box_comic_template.pdfIn PDF document text
    • http://fukokikedusej.epizy.com/melalunoxadadegogikarikaj.pdfIn PDF document text
    • http://rilifufamorupud.epizy.com/bloody_roar_4_game_free.pdfIn PDF document text
    • http://vijunipajo.epizy.com/basic_electronics_course_outline.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7F 5000 bytes
SHA-256: fafb86355fcd2475fbf41e788a731bdb73efddda4b9cb30ad53fb88e4ad904dc
font_01_sfnt_off00013e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E50 10996 bytes
SHA-256: f87946222e8cb72cd6b5a82b26c6a02dbb74b473af076e3dcd95cdf9c8da585f
font_02_sfnt_off0001636b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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