Malicious PDF — malware analysis report

Static analysis result for SHA-256 50aa33abf450d612…

MALICIOUS

PDF

69.5 KB Created: 2021-02-03 19:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bc87d859b163d4b24de47be786c38be0 SHA-1: a7f8e95b90a28b8ab6f917bcbb6fdd7b2e80a8c3 SHA-256: 50aa33abf450d612e0d459ba2799756a01ba3b3f90f4c992bb8d149bd6a46b99
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=beaver+county+pa+recorder+of+deeds PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476453/normal_5fec2214b134b.pdfIn PDF document text
    • https://tewutenuka.weebly.com/uploads/1/3/2/6/132695339/govof_nidoto_berulabowizenik_parowaronikase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6017a518eaf71.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/8902802.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/doxisoriz-surelifowave-bugaxapal-xefava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5fcd25759ecea.pdfIn PDF document text
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/fazisetekozi.pdfIn PDF document text
    • https://vifomamup.weebly.com/uploads/1/3/1/1/131163898/0cc1036e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fd09f64d2296.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/fapotosuxuzosotugi.pdfIn PDF document text
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/da3ea985a5a.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/mogipegi/pokemon_battle_revolution_game.pdfIn PDF document text
    • http://suvalon.rf.gd/transformers_bumblebee_movie_camaro.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/penanojadajulorotigekaf.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/free_hair_stylist_resume_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/7956599491.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/sojarisipipag.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/burton_snowboard_binding_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/2702957903.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/bodybuilding_tips_app.pdfIn PDF document text
    • http://nolumuj.epizy.com/30510838853.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/avery_labels_template_s.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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 5328 bytes
SHA-256: 326d46952ac5272d271334e6403214961e1c7533e6d95c50bf456c8fcf60f0fc
font_01_sfnt_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 11388 bytes
SHA-256: ef82ad363822919241f97c1e999e87d5c85a5d96e67887c03a3c388257dd332d

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