Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cd7f13ef40a4af…

MALICIOUS

PDF

85.0 KB Created: 2021-03-30 23:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5d17005e04f7a105db324456e64d76f9 SHA-1: 29bb40576c98ff10911a4230586a22e40874867d SHA-256: 58cd7f13ef40a4afb48b22b3d2c81291b9c500352d200a98d882a7ba2fd5fe56
126 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 numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to "Affichage obligatoire 2020 pdf", likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/award?keyword=affichage+obligatoire+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404121/normal_603c1c5b857d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_606249bfdaf1e.pdfIn PDF document text
    • https://nakotugobal.weebly.com/uploads/1/3/5/3/135300729/320ee.pdfIn PDF document text
    • https://wefojomoki.weebly.com/uploads/1/3/5/3/135389947/5779830.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/4435003.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/b4487e1f5b2a.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/43867513582.pdfIn PDF document text
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/vuxolekomefegadiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifavamifikas.myartsonline.com/milpersman_1306_instructor_duty.pdfIn PDF document text
    • http://fejozimi.epizy.com/what_you_feel_when_you_are_in_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cb09b9-0ca5-495c-afde-3294772c6552/pawuzunamobu.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/logitech_harmony_880_software.pdfIn PDF document text
    • http://wiwawilif.epizy.com/49_angelic_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/free_indesign_email_signature_template.pdfIn PDF document text
    • http://gozudivigel.epizy.com/tigeba.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/22524851333.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/poni_camera_photo_editor_free.pdfIn PDF document text
    • http://tipofib.rf.gd/medical_report_sample_format.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/best_wilderness_survival_tips.pdfIn PDF document text
    • http://dorigosij.epizy.com/caramel_candy_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/36525361498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3034b99-0452-493f-8c58-488765f513b2/kindle_paperwhite_user_guide_for_dummies.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_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 5644 bytes
SHA-256: e606b39a6beb4b7b4b4516137ecdfe2d49ad7c7282449785e04d80ef60509e6e
font_01_sfnt_off00011e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E27 12448 bytes
SHA-256: 8b1735d1a82bc08985293150305f7c4e0bdfc78c5c94b9aa17f1ffc4be4175cf

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