Malicious PDF — malware analysis report

Static analysis result for SHA-256 161a38fa5e68d9e6…

MALICIOUS

PDF

73.9 KB Created: 2021-03-16 03:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860ffc0244d151d7c158660f17d34719 SHA-1: 7624f074ca62771c67fc8c519ccd0e550b6c8f4c SHA-256: 161a38fa5e68d9e642d333b6dc5186e9fae7dc2d9b84adde1ccb99470eb40cc0
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 likely intended to trick the user into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of a malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=philosophy+for+dummies+tom+morris+pdf
    • https://cdn.sqhk.co/nuwezomu/eigco2Y/figuwewegafeto.pdf
    • https://cdn.sqhk.co/wusuzevomo/e8hayH1/silopuv.pdf
    • http://barojenixumaja.iblogger.org/jepalotekepaxuzis.pdf
    • http://rasazevedip.22web.org/preformatted_text_is_displayed_by_the_browser_in_a______font.pdf
    • https://cdn.sqhk.co/felinavaw/blC4ijP/edy_s_vanilla_ice_cream_nutrition_facts.pdf
    • https://cdn.sqhk.co/xuwolegu/gecjidL/rush_rally_3.pdf
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5ff96c2aea26d.pdf
    • https://cdn-cms.f-static.net/uploads/4388063/normal_6018d03d1623d.pdf
    • https://cdn.sqhk.co/lanumakefu/ggVs0ZN/15553654169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xesivaraxetude.rf.gd/43069220985.pdf
    • http://rukodulaban.epizy.com/the_greatest_lie_on_earth_edward_hendrie.pdf
    • http://nimobavaze.epizy.com/nejomamenumev.pdf
    • http://vikogen.epizy.com/dedipijatunen.pdf
    • http://dizojid.rf.gd/traxxas_tqi_receiver_voltage.pdf
    • https://uploads.strikinglycdn.com/files/545fc38e-eb70-4bbc-b9d8-f6d97417a62e/85004676046.pdf
    • https://uploads.strikinglycdn.com/files/cec07e00-d171-4ad7-8ddd-d58db8e9076e/nufitosarazixoxoj.pdf
    • https://uploads.strikinglycdn.com/files/fc3a0598-ad8e-43b6-8be2-04ea72de7109/rewez.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_off0000e51c.bin
3a6d99117b9efee004f4d67488f24a5d46499fa28588f866c78489e50168b3bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 5172 bytes
font_01_sfnt_off0000f699.bin
bef51c86b5de0a5bb6a999f5afa066107322585a0421f42ce7272d62c0e7f2de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 10552 bytes

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