Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52b8cf8237912a6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 17:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd07825436efa83629b8cf59b174dfe SHA-1: 7ea611475b84649e78c274afeeea37ffc6ab8112 SHA-256: b52b8cf8237912a60d94fe32def70204119fd69fa7d77e82e3171b828f3f8592
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a phishing site, suggesting the PDF is used as a lure to trick users into visiting a malicious domain. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attack.

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://jottigo.ru/award?keyword=baricco+castelli+di+rabbia+pdf
    • https://static.s123-cdn-static.com/uploads/4446773/normal_6008a70deb638.pdf
    • https://cdn-cms.f-static.net/uploads/4411917/normal_605094b41bafa.pdf
    • https://static.s123-cdn-static.com/uploads/4402000/normal_5fe37f1a87783.pdf
    • https://cdn.sqhk.co/wekaradukuve/jfhgFjb/aladdin_and_the_king_of_thieves_trailer_music.pdf
    • http://zowefokixot.iblogger.org/party_poster_free_template.pdf
    • http://tivepijezar.22web.org/74892494783.pdf
    • https://cdn.sqhk.co/xotabuti/0KgihiO/my_talking_angela_2_game.pdf
    • http://xbet1.fun/lethal_street_fighting_self_defense_systemeamun.pdf
    • http://flowerport.store/811425943408somc.pdf
    • https://cdn.sqhk.co/luwagoma/Vzhatij/phone_tracker_free_online_australian.pdf
    • https://cdn.sqhk.co/texojijoraso/XKgftBF/39981412715.pdf
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5fedc83bdcf88.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_601153719b418.pdf
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fc5c72ddabfd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_b1b0d927009649dcbe54cb4bab96d611.pdf?index=true
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6f50c33beed1417fac782d58ac0bd34b.pdf?index=true
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_ed506014836f49a0955d3ae79c490370.pdf?index=true
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_dbf53b307af843358e6703ea9d3311ae.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91c.bin
7055e207151fbc8448990f1a008f4d268bcdc4adc3fa55a5949e471ca24609c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 5336 bytes
font_01_sfnt_off0000fb47.bin
d3cab42e40c7d5dc8d80b3393874b7b63b39093d522583a7266d55671247b341
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 12676 bytes