Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0c2bf50d864d8f…

MALICIOUS

PDF

85.9 KB Created: 2021-03-25 15:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 896b60bb37a01b1617b3b2b86a86fd7c SHA-1: 76136aadca6de3de569ed8f433d1ad37055fa154 SHA-256: eb0c2bf50d864d8f5204e80c312570d6095179b792723623e5214b60d08cf782
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL pointing to a malicious domain, identified by both heuristics and ClamAV. The document body, though heavily obfuscated, suggests it is related to educational material, likely a lure. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=algebra+1+unit+8+test+review+answers
    • http://alcozerox.com/c_sharp_programming_books_in_hindi2wjhk.pdf
    • https://cdn.sqhk.co/sejiragidu/hdhbjH5/bobugimotamomotej.pdf
    • http://ihsteam.ru/trigonometry_ppt_for_class_10_slidesharexy6gq.pdf
    • http://idealica-italiaofficial.site/hide_caller_id_android_6m97w2.pdf
    • https://static.s123-cdn-static.com/uploads/4386335/normal_5ff7902e1595b.pdf
    • http://cg-designer.xyz/pokemon_games_for_android_without_emulatorcx5tw.pdf
    • https://cdn-cms.f-static.net/uploads/4471514/normal_6011b6ab7aa4d.pdf
    • http://letnesil.xyz/monte_carlo_ceiling_fans_manual501pg.pdf
    • http://1xbet-regi.site/bedajonosefugikudisotibif7lo6h.pdf
    • http://igcopyrightclient.com/jatasilejelamasxyo5i.pdf
    • http://govnosiakxws.online/mapusibitivbccbd.pdf
    • https://cdn.sqhk.co/bomikiwolug/jiajjih/23702720048.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/95202724-e0a7-4a2a-a0ea-2fccf00ec231/how_to_use_keyboard_as_midi_controller_cakewalk.pdf
    • https://uploads.strikinglycdn.com/files/e02d0134-caa9-4a5a-a9cb-85463fb974f8/what_is_the_theme_of_deep_water.pdf
    • https://s3.amazonaws.com/dezajok/71694155807.pdf
    • https://uploads.strikinglycdn.com/files/e5950432-610d-478b-a5de-73f26b0080b5/how_to_order_online_old_navy.pdf
    • https://uploads.strikinglycdn.com/files/4704abf3-d2b9-41e5-a36d-a337da4650dd/tyt_md-9600_codeplug.pdf
    • https://s3.amazonaws.com/salosibejodod/subefowa.pdf
    • https://uploads.strikinglycdn.com/files/2a242974-52c7-41cd-b7d5-09cd65a44aaa/giparupozoweredilisinat.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_off00010259.bin
93b3110d83f0433e7c7e53871319962e3d3997d3307b69769de5341cfab0cbbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 5380 bytes
font_01_sfnt_off000114c5.bin
a0da224590e01b60329cd8f46aad37801b6d6d973e7980e8ed3931e5893cf2ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 5864 bytes
font_02_sfnt_off000124d6.bin
18c3529769480a83b1c23ff1c8e402d2541b985c2cc302b88b26fc8bd8b134d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 10900 bytes