Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db527cf35cd3f81…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 16:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aac8fb712a6ef713d2ed41ab38e36b2 SHA-1: 41b4e8a01b8ea776f42585f9b70028757eb2476a SHA-256: 4db527cf35cd3f817787c2716f12b142cc1b4e3d4241a2948f4e1aa85dfef5b7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a malicious domain, likely to host a phishing page or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=the+spoils+system+led+to+which+problem
    • http://save50.pro/semunosagaguti422if.pdf
    • http://detonic-romania.website/637497466449ed0e.pdf
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/jevuzo-mizemax.pdf
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/4f65ba2.pdf
    • http://losinglotterynumbers.com/rovulelebonemubepawougawi.pdf
    • https://cdn.sqhk.co/wirowanorax/1djngg9/license_plate_bingo_car_game.pdf
    • http://usene.xyz/96251720397cnyp0.pdf
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/lipafebolorumivewo.pdf
    • https://cdn.sqhk.co/linotepibubi/fjVALi0/nakebubukubije.pdf
    • https://cdn.sqhk.co/sigidezok/yjiCggz/jelafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duguferebijojo.rf.gd/skyline_nomad_travel_trailer.pdf
    • https://uploads.strikinglycdn.com/files/067593ce-489a-467f-af9c-fb3f890b1335/luxubarobunasire.pdf
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_119e5fe2aa874af58f0e5ddcbfe29df5.pdf?index=true
    • http://dunupepemogakiw.epizy.com/amazon_the_poets_companion.pdf
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_eb6633512c084b2dac2cf5159b8dc6bf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d227a3fc-26d0-497c-ad91-b93fd00c6645/norstar_phone_system_feature_codes.pdf
    • http://vuzozan.epizy.com/drpu_bulk_sms_free.pdf
    • https://uploads.strikinglycdn.com/files/38070f49-192d-4813-a9e1-01eab8ed47d5/is_acura_ilx_expensive_to_maintain.pdf
    • https://uploads.strikinglycdn.com/files/4123bc37-495e-413c-a4fb-f1d899201023/gujepotema.pdf
    • http://gedokimisizat.rf.gd/judumabope.pdf
    • http://vabuperupijod.epizy.com/tyt_th_9800.pdf
    • https://uploads.strikinglycdn.com/files/2b25ae6d-9952-47aa-ab52-6b2a1df911cc/69809581823.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_off0000e8a0.bin
7a26cacd38e55c66deffdf30cad0c8a44abef061329a396f11da56b4a2ccde9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5384 bytes
font_01_sfnt_off0000fad9.bin
f0bc6b6f1380b5b231f4eee88078ba933fbbdb6beb143150d02fac44c118eb1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 11612 bytes