Malicious PDF — malware analysis report

Static analysis result for SHA-256 1169e029abf3e52c…

MALICIOUS

PDF

83.3 KB Created: 2021-04-05 19:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b8c114dc1f26afc2033b91d56781f5 SHA-1: 26b6e461244d4be43ee626543673d3ac22cee6d9 SHA-256: 1169e029abf3e52c0edfa3dd7d03970dd04e7124fd733603714adcbd7c44ba44
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, disguised as a 'Vault dweller's guide', likely leads to a phishing or malware download site. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting malicious links.

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://maypoin.ru/wix?keyword=vault+dweller%2527s+guide
    • https://cdn.sqhk.co/xufuwejaxe/agi10gg/top_100_games_on_ps4_by_playtime.pdf
    • http://my-favshope.online/88054475170fc4qh.pdf
    • https://cdn.sqhk.co/zeburozupax/Bgigdji/drive_for_speed_mod_apk_latest_version.pdf
    • https://cdn-cms.f-static.net/uploads/4448096/normal_602526ab84a96.pdf
    • https://cdn-cms.f-static.net/uploads/4417309/normal_60399e11c1b54.pdf
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca231076e0b.pdf
    • http://4bochki.ru/how_to_be_a_great_leader_of_your_teamvj6lg.pdf
    • https://cdn-cms.f-static.net/uploads/4471273/normal_60200e13e190c.pdf
    • https://cdn-cms.f-static.net/uploads/4390385/normal_60684c601c177.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_60583cfe82178.pdf
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5fe10f1b72f87.pdf
    • http://trikolor.site/chess_game_rules_in_englishgb97q.pdf
    • https://cdn-cms.f-static.net/uploads/4480383/normal_6030fbdf5bb5a.pdf
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5fdef0cc28704.pdf
    • http://nncucuucuc.space/citizen_gn-4w-s_set_time3grq2.pdf
    • https://cdn-cms.f-static.net/uploads/4385014/normal_60635312bed9d.pdf
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5ff22d3f03ec5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dbb96317-214a-4915-918c-823e1859ab3d/89674861049.pdf
    • https://uploads.strikinglycdn.com/files/e663dd01-0a27-4298-8e73-a3884db39251/histria_do_futebol_feminino_no_brasil_resumo.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_off0000fb53.bin
2530911cc6b056f6b966187071220229f1fb90d564879866e46bb79581b69f13
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB53 3240 bytes
font_01_sfnt_off000106e2.bin
e4145d245dcbd681efb809d2f3f9086fcd5f69859394ddcaff2aa49a7c1f73c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 5084 bytes
font_02_sfnt_off0001185a.bin
79b79d5096bbe4053d26e9592ff03601cdf2f8b1b18df4d97fc0c0c63508adaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 11180 bytes