Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0435cf370f22e43…

MALICIOUS

PDF

97.2 KB Created: 2021-03-18 13:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe003ea058283793f68b6b62c504c96 SHA-1: df48cbab16d1c35777a6a1400144c777b7783707 SHA-256: c0435cf370f22e43c5fd7490e5bb24b1dfcaf793f541eb2ca96b9e3b76613043
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of external links within a PDF document, combined with the malware detection, suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://botokaw.ru/award?keyword=rockwool+insulation+properties+pdf
    • https://cdn-cms.f-static.net/uploads/4421934/normal_602c5aba09c79.pdf
    • https://cdn.sqhk.co/mepapogivoma/b4ghijT/waraze.pdf
    • https://cdn-cms.f-static.net/uploads/4455381/normal_60196feacf36f.pdf
    • https://cdn-cms.f-static.net/uploads/4478408/normal_5fd9c66d74b0a.pdf
    • https://cdn.sqhk.co/fofanibiv/OHhcJge/mancala_multiplayer_online_free.pdf
    • https://cdn.sqhk.co/vadavenaw/VBhjUtM/xipuwixi.pdf
    • https://cdn-cms.f-static.net/uploads/4444351/normal_6036cea76a3a1.pdf
    • https://cdn.sqhk.co/gugirejol/7igd3gh/66376235683.pdf
    • https://cdn.sqhk.co/mudinaxape/iiibjfn/let_s_farm_facebook_game_tips.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5fe661373e30c.pdf
    • https://cdn.sqhk.co/tikikizeveni/hWZp8nC/adamantine_weapon_5e_cost.pdf
    • https://cdn.sqhk.co/xejudawadoni/4WaxSZZ/most_wanted_free_download.pdf
    • https://cdn.sqhk.co/naxupowu/PHthaeV/mine_legend_idle_miner_game_download.pdf
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fe781ba4de9c.pdf
    • https://cdn-cms.f-static.net/uploads/4486034/normal_600c6948dfb1d.pdf
    • https://cdn.sqhk.co/buzomesil/9BkicWi/dwight_yoakam_songs_fast_as_you.pdf
    • https://cdn.sqhk.co/fusojafiza/gfhgjiv/20610282354.pdf
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fe609ccf21d2.pdf
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5fe4760e24bdb.pdf
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fcd11f13da86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pekamidakoj.atwebpages.com/supply_chain_management_project.pdf
    • https://uploads.strikinglycdn.com/files/46df8a83-9c97-4c1f-940d-a462bb4fe249/zididirewunomukaxaxe.pdf
    • http://riveminigokoxa.myartsonline.com/zutidasosafobaxegawade.pdf
    • https://uploads.strikinglycdn.com/files/bea70992-0b17-49d8-a5c1-741266b57131/35311161130.pdf
    • https://uploads.strikinglycdn.com/files/8a6bdee5-a1f0-4cc4-9521-f0705f486d49/samsung_un40eh5300f_stand_base_with_screws.pdf
    • https://uploads.strikinglycdn.com/files/d3f420f6-1c90-402d-b5a2-43169426e0df/28378797165.pdf
    • https://uploads.strikinglycdn.com/files/6935524c-a0db-4980-a679-4c96ba9e17c4/kigakarub.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_off00013dfa.bin
a7d09f7fcc1f79bb6a40c33bb11201ab8734f690bffa99be7a995cbbf1e410a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFA 5312 bytes
font_01_sfnt_off0001503b.bin
7fee4c9cdfeab89e70869a1eb5dae25a0670b0bb2e80baf16f0361ef8d756d14
pdf-font-stream PDF embedded font (sfnt) at offset 0x1503B 11268 bytes