Malicious PDF — malware analysis report

Static analysis result for SHA-256 73de39f6edac399f…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 17:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 169bad2296e7f9071f438dbfcf36f481 SHA-1: 285963482328bb3ce6de2626b5f0d42c6ac14774 SHA-256: 73de39f6edac399fa858af3178739f1980b76ed32028c1ba92e330d5c4aa5067
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to 'Mainstays 3 shelf bathroom space saver instructions pdf', indicating a phishing or malware download attempt. The presence of multiple embedded URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=mainstays+3+shelf+bathroom+space+saver+instructions+pdf
    • http://ninejibovukole.22web.org/12141380962.pdf
    • http://weareanonymous.org/why_does_my_hp_printer_say_there_is_a_paper_jamwlrxo.pdf
    • http://csxmoney.info/dumabinanogujumphkfm.pdf
    • http://muvibigi.22web.org/how_to_fix_a_samsung_refrigerator_door_handle.pdf
    • http://nubolutlion.xyz/66362679437ie8yp.pdf
    • http://mmmmmme.space/76589004227wmfxs.pdf
    • https://cdn-cms.f-static.net/uploads/4490539/normal_602e71e3a4444.pdf
    • http://unlockdeals.shop/navogixewajacnssp.pdf
    • https://static.s123-cdn-static.com/uploads/4369784/normal_5fcc45e64e97a.pdf
    • https://cdn-cms.f-static.net/uploads/4465555/normal_600e75aec38d2.pdf
    • http://newsportstechnology.ru/how_much_does_it_cost_to_have_my_dog_dna_testedotq9n.pdf
    • http://ketotreno.buzz/raymarine_c120_size9zov9.pdf
    • https://cdn-cms.f-static.net/uploads/4418013/normal_60262a48c1209.pdf
    • http://persequenteamsohbet.com/chu_chu_tv_videos_freegou8p.pdf
    • https://cdn-cms.f-static.net/uploads/4420250/normal_60359e9683319.pdf
    • http://lnstagramverifycentre.com/dizejalusufimazibomakanangkhu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://delenujafoxa.rf.gd/jomepagix.pdf
    • http://gopexodek.rf.gd/69937547550.pdf
    • http://lawigut.rf.gd/free_arcsoft_webcam_companion_3.pdf
    • http://nilikejavovop.rf.gd/4988491330.pdf
    • http://jowuwivipi.rf.gd/10799144878.pdf
    • http://tolejax.epizy.com/jilelowoludegodeberodigul.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_off0000e95d.bin
b82f436fb8146da139c0ccfecb4eeaf4c130facf68e6fe6db3bf63604af165c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 5748 bytes
font_01_sfnt_off0000fcb7.bin
285c229b5d7f89c5d97129c1da1c4f5d298a8919f6be9952876844e8e9caedf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 10780 bytes
font_02_sfnt_off00012175.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 4324 bytes