Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f826fb97c061987…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 07:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822d0cce3fe47802ca7e23026a2c6c3c SHA-1: 185d2460b4138867401781f57509b7e654b12bb7 SHA-256: 9f826fb97c06198747c35e840c94d3e9268c85afa60ea180660e49fd4d8bff14
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier as malicious. ClamAV also detected this file as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to an 'aerospace syllabus'. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=gate+2020+aerospace+syllabus+pdf
    • https://cdn.sqhk.co/titesojijuko/ji2geCa/61629503598.pdf
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/89746.pdf
    • https://botimosiwipam.weebly.com/uploads/1/3/1/3/131398053/tapuvubuvugirovipu.pdf
    • http://mowefopovog.mywebcommunity.org/briggs_and_stratton_500_series_158cc_carburetor_adjustment.pdf
    • http://jiteruruw.sportsontheweb.net/66644726333.pdf
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/a246fa.pdf
    • https://cdn.sqhk.co/gixezovof/czjjdgg/cheap_funny_race_car_shirts.pdf
    • http://dafagaketa.sportsontheweb.net/zonotorune.pdf
    • http://bukipumil.mypressonline.com/how_to_open_a_doro_phone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tadawezobepikel.rf.gd/maminokufilomomipegobuvaw.pdf
    • https://uploads.strikinglycdn.com/files/5f706e68-a015-420b-b2e9-feeae8d85f75/watchman_nee_quotes_on_the_holy_spirit.pdf
    • http://darafefe.rf.gd/castle_crashers_remastered_all_weapons_guide.pdf
    • https://s3.amazonaws.com/zerejibixupav/asked_and_answered_steelers.pdf
    • http://gotipubejajod.rf.gd/13310404253.pdf
    • https://s3.amazonaws.com/jaloto/5306274255.pdf
    • https://s3.amazonaws.com/tugabijenovili/47818743109.pdf
    • https://uploads.strikinglycdn.com/files/c9d7a8c5-7915-4f05-8bc5-89ffc5c0b050/how_to_get_hulu_on_lg_tv.pdf
    • http://fepusum.onlinewebshop.net/where_can_i_donate_unwanted_toys_uk.pdf
    • https://s3.amazonaws.com/janodojivi/voleragokavubozine.pdf
    • https://s3.amazonaws.com/kikunojulejuj/book_pimp_by_iceberg_slim.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_off0000f651.bin
3b72b9b3cf4f83924c486d4a9ce45de434f36d7d348761a9134e368435f0ed73
pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 5696 bytes
font_01_sfnt_off000109c4.bin
22639cc39d1f1153672d8570faac53aefdc1e3450e53f7c092fff18ba595bad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x109C4 11612 bytes