Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c05cd84d159a8f9…

MALICIOUS

PDF

92.9 KB Created: 2021-03-21 06:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70069027f9d008ebf3f033bec453c52a SHA-1: eb183589073cfa821808f68a5f70932cb53e4d13 SHA-256: 1c05cd84d159a8f995d09bd4a66746ee064cdf39cef7e295598c13fbc04995b5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=applied+medical+anthropology+pdf
    • http://dayzcommunity.info/prosedur_arbitrasejfoz2.pdf
    • http://itanto.space/who_moved_my_cheese_free_audio_download4po60.pdf
    • https://cdn.sqhk.co/butiluluvuk/egggghc/happy_wheels_unblocked_demo_2.pdf
    • http://trackengine.host/certified_analytics_professional_study_guide6j83d.pdf
    • http://fasumidivojasuj.iblogger.org/90658412152.pdf
    • https://cdn.sqhk.co/dasadogiso/fv2LMC5/65075064200.pdf
    • http://cocobuka3.xyz/31508446197uceb9.pdf
    • http://djami.ru/57003556594noy2g.pdf
    • http://m-laskin.ru/how_do_you_get_into_ketosis_fastqi19f.pdf
    • https://cdn.sqhk.co/devuzemalut/R1gfw9W/fulinizamom.pdf
    • http://apelsins.space/ernie_ball_volume_pedal_dimensions7om9f.pdf
    • https://cdn.sqhk.co/vumojakizaw/hgcgiNI/nosalebugajuxebu.pdf
    • http://ionatr.space/eat_right_for_your_blood_type_a_cookbook77811.pdf
    • https://cdn.sqhk.co/libuzewis/N6gdgiF/xuwaxozosuvularube.pdf
    • http://retys.space/ecg_interpretation_made_incredibly_easy_youtube73292.pdf
    • http://jefozogez.66ghz.com/data_structures_and_algorithms_using_c.pdf
    • http://pisozuzata.iblogger.org/abraham_lincoln_biography_in_telugu_free_download.pdf
    • http://www-sfr-fr-monespace.com/selinonuxumenidumoramaraipvu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bafd1682-7c30-4dab-a448-59f4326964c4/97328237250.pdf
    • https://uploads.strikinglycdn.com/files/406b8369-1a4a-4e67-8911-287294a4d669/77521026785.pdf
    • http://japusorusepex.rf.gd/5823695692.pdf
    • https://uploads.strikinglycdn.com/files/1cc2f0e2-9d09-4900-a036-089d873eb439/manajajomowuj.pdf
    • http://fenaxamapug.rf.gd/pukiviwugiluw.pdf
    • https://uploads.strikinglycdn.com/files/7c960936-3ea2-47dd-a237-5f961d11df0e/savujobezakoxatufuminuza.pdf
    • https://uploads.strikinglycdn.com/files/0be64df9-dcff-4837-a424-733f5dde74a6/11288010593.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d3b.bin
d75fe718c5a8c91904a17a95aa34397d534a5899341ded668ff20d07bdf5a5ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3B 5480 bytes
font_01_sfnt_off00013fc1.bin
08ecc73f2fd17beb0c1ddb0f16945ee31bfa971a35d96f3e0de2bebe1aab3893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 11780 bytes

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