Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd87b6717f340a68…

MALICIOUS

PDF

85.0 KB Created: 2021-03-27 13:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cfbb21d8ab31c8e5d6f92b5479a70dc SHA-1: 15cdd460c6fe6e76690f592bbfe140869d4acc08 SHA-256: fd87b6717f340a6862424bdb5e5d544e01d19887c6796e262ef26d5e7c6e5d99
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including an advance-fee scam lure and a ClamAV detection for a phishing trojan. The document body contains garbled text but the presence of an external URI pointing to a URL with a 'keyword' parameter suggests a phishing or scam attempt. The primary attack pattern is likely to trick the user into believing they are receiving a prize or parcel, leading them to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://mezovuduw.ru/wix?keyword=algebra+2+multiplying+and+dividing+rational+expressions+worksheet+answers
    • https://cdn.sqhk.co/zivupowixede/jijeQij/android_tv_box_remote_control_setup.pdf
    • https://cdn-cms.f-static.net/uploads/4487935/normal_6040e1cb09a94.pdf
    • http://abzac.me/livudifnys2.pdf
    • https://cdn-cms.f-static.net/uploads/4391620/normal_603923703d729.pdf
    • https://cdn.sqhk.co/nikajovefer/hAvQrhi/kitty_kate_caring_mod_apk_download.pdf
    • http://sodaapp.pro/ren_gunon_conversion_islam3tbeo.pdf
    • http://gogotmif.space/bupuniralujefofesobofoxira23es.pdf
    • http://xrootunited.com/403951527520q7sg.pdf
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fd76b54b3f2e.pdf
    • https://cdn-cms.f-static.net/uploads/4415292/normal_6018c218ea84b.pdf
    • https://static.s123-cdn-static.com/uploads/4490516/normal_6009235284f58.pdf
    • http://mpvideo.org/139011369740nsgt.pdf
    • http://opit.space/negafamudumetoniziduu60xq.pdf
    • https://cdn-cms.f-static.net/uploads/4387706/normal_601ec8a058b07.pdf
    • http://kernig.store/writing_idiomatic_pythonutona.pdf
    • http://bigchance.pw/thrustmaster_hotas_x_star_wars_squadronsetfc1.pdf
    • https://cdn.sqhk.co/madufuxenuw/OejjBhb/top_100_golfers_in_america.pdf
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5fd7b610c21c5.pdf
    • http://alcozerox.com/xevigonutezigabejopezoga2z31j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dudujopixejikug/6247082914.pdf
    • https://s3.amazonaws.com/xidazeze/sqlite_database_tutorial_android.pdf
    • https://s3.amazonaws.com/lupebesu/air_force_1_valentines_day_price.pdf
    • https://s3.amazonaws.com/povodijirig/jinja_template_ansible_examples.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_off00010a85.bin
fb04c336c489edbe93080c1aa060b94d31959e9f75f8c02056c0c22c973d5507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 6020 bytes
font_01_sfnt_off00011eef.bin
dad97cb461df41513306dea8064fd217af2f51df4261240bc82d2947be8a3f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEF 11412 bytes

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