Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3503b2fc83fef9…

MALICIOUS

PDF

77.4 KB Created: 2021-02-21 19:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dd49326189eddc41a3abb07c5ecef501 SHA-1: 757c81421a035ee1ba67c4fa860359ca55decbc7 SHA-256: ef3503b2fc83fef942b643d5dad996f06ba1c4559f6fd9432a14c830322d05bd
104 Risk Score

Malware Insights

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

The PDF contains an embedded URL that masquerades as a printer alignment page, likely to trick the user into downloading a malicious payload. ML classifiers and ClamAV detections strongly indicate malicious intent. The presence of a download button heuristic further supports the phishing lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=hp+envy+5530+print+alignment+page PDF link annotation
    • https://cdn.sqhk.co/zogameva/atBijhf/38915770289.pdfIn PDF document text
    • https://cdn.sqhk.co/fopeziriga/Hfjalia/fancy_pants_adventure_3_unblocked_weebly.pdfIn PDF document text
    • https://cdn.sqhk.co/papedajapej/c4Nwgde/59422672770.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/icRSjbv/good_tags_to_get_likes_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/qTfibhf/29601910548.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/ajcpfHO/smart_prepaid_promo_data_only.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/vonuxagupeduze/how_to_change_safety_first_thermometer_to_fahrenheit.pdfIn PDF document text
    • http://pixagikaw.epizy.com/transit_maps_of_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/83327532521.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/boutonniere_deformity_feet.pdfIn PDF document text
    • http://xodenumaverap.epizy.com/equipment_requalification_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/37414862715.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/jivopag.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/kewekesixuvuwebu.pdfIn PDF document text
    • http://mafilijesov.epizy.com/52350385730.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/budapest_club_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/types_of_angles_worksheet_answer_key.pdfIn PDF document text
    • http://lelixik.epizy.com/time_by_the_hour_worksheets_for_kindergarten.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_off0000f09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09B 5512 bytes
SHA-256: 437743336376e6adcfa84b4d629dd1f02f7ab2e766c58060913a88e16777dbf0
font_01_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 11048 bytes
SHA-256: f604df7dda30bd8d2d5f2e701b4b6dd27ec5216dff1b5498fb30a90e4ef29a0b

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