Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2569af6bbbcb5e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 07:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7502e9a528f9a16e76869d3b629ad400 SHA-1: ce39072fea08a4736ba5d707507c727c470ab190 SHA-256: 1b2569af6bbbcb5e5deddbbc1bc9eabb9576b0d4801fb8e12bc80716826c6220
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect users to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to an 'armorsmith guide'. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=swg+nge+armorsmith+guide
    • https://cdn.sqhk.co/bopelara/cJjaEjc/73328271057.pdf
    • http://getinugalukef.iblogger.org/informal_letter_writing_for_4th_grade.pdf
    • http://nasty666.space/85919358564k58u.pdf
    • http://tohld.in/long_john_silvers_dealsf6jsx.pdf
    • http://helplnstagram-confirm.com/32424948436xoyhf.pdf
    • http://jifinipufiwide.iblogger.org/puedo_aprender_ingles_escuchando_canciones.pdf
    • http://everydayy.fun/bronica_etrsi_manual_loading_filmqn4pp.pdf
    • https://cdn.sqhk.co/pifizumux/dBgebgj/balloon_decoration_for_sale.pdf
    • https://cdn.sqhk.co/kinubowa/Afij6jd/87122510525.pdf
    • http://golomashvanna.xyz/audio_technica_lp120xusb_direct-drive_turntable_w_usbu1qb7.pdf
    • http://ryursew.space/f2p_ironman_fishing_guide2u5mz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_f6dcfc7cc879493d849199fcc227cce0.pdf?index=true
    • https://s3.amazonaws.com/bugutaj/sizemaran.pdf
    • http://wosepejodobedaf.epizy.com/tesavog.pdf
    • https://s3.amazonaws.com/farowug/53243768479.pdf
    • https://s3.amazonaws.com/numegubowalonan/21646106075.pdf
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_3b0804369ceb448f8b989b3828e22ed4.pdf?index=true
    • http://fezedosez.rf.gd/diviser_un_en_deux_parties.pdf
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_4e4d9ac9a9ca42cfbc482e2be7d689cb.pdf?index=true
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_3bb158f07b184db387fa6790d3e87d1b.pdf?index=true
    • https://s3.amazonaws.com/jeponowon/hisense_portable_air_conditioner_and_heater_manual.pdf
    • https://s3.amazonaws.com/wujodibu/luvejiboxozapovonasar.pdf
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_f9176fd04f58439d9dcd12ac4fdb6afb.pdf?index=true
    • 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_off0000f160.bin
8afecb37db3976976a22bdc1e24f833d92318d6d36b9f4b1a1593a59700cd488		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 5284 bytes
font_01_sfnt_off00010331.bin
6ca241d3d7d7325223cce4ebe731987ffe95fa27877a77940e1d8a89bd8c520c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 10860 bytes
font_02_sfnt_off0001284d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1284D 4324 bytes

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