Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfdfec0464cc9c7…

MALICIOUS

PDF

76.0 KB Created: 2021-03-08 20:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 027d201727bdf4569facc824b4511ca3 SHA-1: 53eb1198a458113216076695b1287a87c992961b SHA-256: 3dfdfec0464cc9c7ffd4a435f75b3709957725d1661832491d80af1e548fe2bb
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary suspicious URL pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text fragments that appear to be part of a lure, referencing 'powerpoint template'. No scripts were extracted, but the presence of multiple external links and the overall detection profile strongly suggest a phishing or malicious content delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://mezovuduw.ru/123?utm_term=b%25E1%25BB%2599+powerpoint+template+%25C4%2591%25E1%25BA%25B9p+xu%25E1%25BA%25A5t+s%25E1%25BA%25AFc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417534/normal_6040f13247aea.pdfIn PDF document text
    • https://sivutonawoxed.weebly.com/uploads/1/3/4/6/134687919/medine-wogonivexat.pdfIn PDF document text
    • http://zanartcc.net/cunto_tiempo_tarda_el_cuerpo_en_eliminar_las_hormonas_del_implante48f48.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/46e25103a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6039f1c068312.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/fuzafeto_fowolijubov_vozin_nejojujuvawox.pdfIn PDF document text
    • http://varuxof.22web.org/gajefodokeluruvake.pdfIn PDF document text
    • http://erogancolumbia.site/rexusujavisenaperomavefe8fu56.pdfIn PDF document text
    • http://getdouche.xyz/filapobotubitidesbcaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_6022d569af1cb.pdfIn PDF document text
    • http://supernefritroller.xyz/google_sheets_expense_tracker_template92uz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/24760874835.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/aavesham_movie_telugu_songs.pdfIn PDF document text
    • http://xuxusemo.epizy.com/android_device_manager_without_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/81386894125.pdfIn PDF document text
    • http://pugomifo.epizy.com/luliwuvabuvazezupurez.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/autocad_free_2014_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/94309094881.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/reporter_young_wrocaw_arkady.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_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 6288 bytes
SHA-256: 7194cc40d73f8cdb942bd8a25429e4c9c1e8c328f9959bcfb01bfb7f282c05db
font_01_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 10852 bytes
SHA-256: e2d9c9f486475bd21b317c8de6ddff8fc5dbd247af79387f620b73dc80d5faed

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