Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b326405e5cba106…

MALICIOUS

PDF

75.0 KB Created: 2021-03-11 23:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f760e6357b609feaca21a46b1dadbca SHA-1: d32e5db7a81fd145f62734db20e4f4256c9dabbd SHA-256: 2b326405e5cba106c69b3068695d3024ced113c7cab14a15ef8a8139063bc4f0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1553.005 Security Software Installation

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, and a heuristic indicates instructions to disable security software. The document body is heavily obfuscated, but the presence of these indicators suggests an attempt to lure the user into downloading a secondary payload, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://nipisod.ru/award?keyword=apowersoft+pdf+editor+full
    • http://razvivatel.blog/kigigudetudarufimowork8c.pdf
    • http://vamoktin.ru/telavef0uqr3.pdf
    • http://1xbet-registrat.site/how_to_switch_on_dish_tv_set_top_box3x4x4.pdf
    • http://dafagaketa.sportsontheweb.net/94770301730.pdf
    • https://cdn.sqhk.co/netimawifes/vhiibgf/how_to_get_free_baby_bottle_samples.pdf
    • https://cdn.sqhk.co/perikowep/gcjfjcP/crowd_running_away_sound_effect.pdf
    • https://cdn.sqhk.co/xagegegozi/j2idjcj/dugesubebuv.pdf
    • http://ninotekega.mygamesonline.org/6201919140.pdf
    • http://sinomefonok.mywebcommunity.org/sovuvaradoz.pdf
    • https://cdn.sqhk.co/zarejesorufo/b7sxcFz/the_faith_family_church.pdf
    • http://closemaze.com/kawasaki_engines_parts_list1kir8.pdf
    • http://vosajizegek.mypressonline.com/68252914373.pdf
    • http://pornbustyvids.com/988674119456h0gd.pdf
    • http://teksalon.xyz/bela_bela_local_municipality_application_form1k2ia.pdf
    • https://cdn.sqhk.co/lamiwifa/jijdgen/12846842197.pdf
    • https://cdn.sqhk.co/rizijuwet/hfjjija/21992071489.pdf
    • http://vovality.club/basic_korean_word_listwjr4l.pdf
    • https://cdn.sqhk.co/xufatirumina/eWlibM1/anoka_county_property_information_gis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://limoxukuk.atwebpages.com/ganifozir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e240.bin
da9739163e325987c2251136b480827f23ea24e8ae408d5d1df581c9a47a1785		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 4904 bytes
font_01_sfnt_off0000f30b.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 1800 bytes
font_02_sfnt_off0000fb9b.bin
9d4f0f911af4c7a36e6da0618ca83b3530bda9721304ca40c270ade9feaccf7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 10016 bytes

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