Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f5e0fcd101687d…

MALICIOUS

PDF

70.4 KB Created: 2021-01-11 18:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e19f3b16ac31629b3d94a0035b0323b5 SHA-1: 4957df59db6fef3a294ee250e668b3250b04bf17 SHA-256: 90f5e0fcd101687db4585887ce074e1bfd42927220ed80e12293e60d6cc82571
96 Risk Score

Malware Insights

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

This 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 'traffset.ru', which is likely used to host a phishing page or download further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=thematic+roles+exercises+with+answers
    • https://site-1195301.mozfiles.com/files/1195301/45204091212.pdf
    • https://cdn-cms.f-static.net/uploads/4486965/normal_5fd6fad6a684c.pdf
    • https://cdn.sqhk.co/fivukidado/QjgtLtK/find_my_friends_iphone_app_download_for_android.pdf
    • https://site-1175421.mozfiles.com/files/1175421/free_battleship_games_for_pc.pdf
    • https://site-1168030.mozfiles.com/files/1168030/jisupupaput.pdf
    • https://site-1176918.mozfiles.com/files/1176918/repulsed_synonyms_and_antonyms.pdf
    • https://site-1176262.mozfiles.com/files/1176262/17344535530.pdf
    • https://site-1166598.mozfiles.com/files/1166598/94128123607.pdf
    • https://cdn.sqhk.co/zegetaru/cPhfjhc/d_j_music_apps_online.pdf
    • https://cdn.sqhk.co/bafesugoguwi/gghfMig/rivalelejibufolunanupive.pdf
    • https://cdn.sqhk.co/rilowikapaz/3jR9gcD/viticulture_tuscany_expansion.pdf
    • https://cdn.sqhk.co/jepipovi/jc7Lgi2/raft_survival_simulator_hack_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d751.bin
aae5810dd37ddeba94eb1c397bb082e80912abbfa50352882eb1bb46a5133dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD751 5148 bytes
font_01_sfnt_off0000e8b3.bin
b78d631527dd0c69519733fc55b6c3e9ca04a94370ed6cb9bf7197a69ad690dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 10624 bytes

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