Malicious PDF — malware analysis report

Static analysis result for SHA-256 2246b35edf0bd0e2…

MALICIOUS

PDF

82.6 KB Created: 2021-04-01 16:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b90bb173616d5a79f99f3c5c2a5b26a SHA-1: 9b926a479a00788311a71596cf8a3a7b8cb1e110 SHA-256: 2246b35edf0bd0e28e074751722ecd055e0864a873a0b881565ea8119b45839a
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a phishing document. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a technical book search, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=cracking+the+code+interview+pdf+github
    • http://dogalijun.scienceontheweb.net/blogging_for_dummies_2020.pdf
    • https://cdn.sqhk.co/nofevemumidu/xjbVhf1/52695230781.pdf
    • http://sarhello.online/4654164694fpluv.pdf
    • https://cdn.sqhk.co/mobovogoneja/c7jhvYo/beginning_spanish_vocabulary_worksheets.pdf
    • https://cdn.sqhk.co/wazuvegox/7lrgjuz/assam_police_si_answer_key.pdf
    • http://vash-fasad.live/android_cantonese_voice_inputit32v.pdf
    • http://ganexofom.iblogger.org/linear_guide_roller.pdf
    • http://pe50off.pro/88970632420d9x4t.pdf
    • http://jonotijero.medianewsonline.com/is_there_an_after_2_book.pdf
    • https://cdn.sqhk.co/sogunixe/ehat1jf/pikazanubavaxujorotebo.pdf
    • http://copyright-rules-help.com/jaxulejuwuvonipsqq39.pdf
    • http://samettemiz.xyz/xegotuxebupetopogufunosed6k539.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea53ea61-475b-43ad-955e-49b5b17278fe/gelapideneme.pdf
    • https://uploads.strikinglycdn.com/files/db4970dd-d824-4962-b90b-ff38f73c94bd/god_is_redeemer_verse.pdf
    • http://gimudujukuweg.rf.gd/lenebojemuvof.pdf
    • https://uploads.strikinglycdn.com/files/a908b72f-3504-4ff4-be91-0e29a271ca44/what_is_a_community_punishment_order.pdf
    • https://uploads.strikinglycdn.com/files/a12f8b94-c073-45e0-b681-f68101a910a8/23459805387.pdf
    • http://pivinonakit.rf.gd/77724494829.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf9.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 6744 bytes
font_01_sfnt_off0000edaf.bin
ca76997379172eee33085c8482c7323aa4c6490e5d9b0518affecd078e7eaab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 2912 bytes
font_02_sfnt_off0000f80b.bin
666be3a829104ef58b95551b863cba047f3bd1b15f96877f327c1908ed5bb238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 5468 bytes
font_03_sfnt_off00010aa6.bin
82bdd5bbfc85c1e7d6874aacfc8608418f900ce392526febb08b95aa24a21e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 2524 bytes
font_04_sfnt_off0001159a.bin
af424474d6df20da34c1e1ceb8c3326e3a8e5bc867a3450fb90f00c699cc7ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1159A 10644 bytes

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