Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc36f3595e0843c4…

MALICIOUS

PDF

76.7 KB Created: 2021-05-07 04:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9fd91bb916aa6d6115e2518556f6471 SHA-1: 7ca7ef580b9baf3c7109e48dc4778713b274a3cf SHA-256: cc36f3595e0843c4439bc274b399565c4ad5abe52d138dd6e2fa96d99b4928e3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, disguised as a search result for a sewing machine query. The presence of multiple suspicious PDF-related URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

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://zajinet.ru/strik?utm_term=how+do+i+thread+a+brother+ls-2125+sewing+machine
    • http://titanovyi-filtr.ru/jidowutorekupadaxad59851.pdf
    • http://neyroskakalka.site/berigigusadobejavae9san.pdf
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5ffed13742291.pdf
    • http://letnesil.xyz/73251510408fbnbu.pdf
    • https://cdn-cms.f-static.net/uploads/4457604/normal_604566860843b.pdf
    • http://copyright-supporthelp.com/troy_bilt_storm_2410_how_to_drain_gasmp56z.pdf
    • https://cdn-cms.f-static.net/uploads/4465151/normal_60521ba868713.pdf
    • https://cdn-cms.f-static.net/uploads/4425924/normal_605286481064f.pdf
    • http://legendbilisim.com/chapter_2_research_format_exampleko1jc.pdf
    • http://circus.market/janes_fighting_ships_19411u9fy.pdf
    • http://promoocaoameericanas.com/alter_bridge_my_championdqe8d.pdf
    • http://digitalcalakk1.xyz/56066134051411qq.pdf
    • http://winoraama.space/spiral_dynamics_test_resultstg11l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanasuvedigo/vamenadupigaw.pdf
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_88b5b338b1c84a1faa14cbfc4d9c8c3f.pdf?index=true
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_cee3b74c15824f5da08d5ba70a1da8ba.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_ed8c5c8b4f25494e95bcaa7a354cefed.pdf?index=true
    • https://s3.amazonaws.com/xokebore/47626562985.pdf
    • https://s3.amazonaws.com/lerezazo/google_play_games_apkmonk.pdf
    • https://s3.amazonaws.com/zevutebulaworel/12481731037.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_off0000ebb5.bin
939d7c479b863060726c1e43af4400a5492e9123943d9934af716b0e0a6e5fa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 5884 bytes
font_01_sfnt_off0000ffb0.bin
cc0b1089a35d036e0bd0cc72486410db01c16262137519e64a985ec0ccaa5874
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 10884 bytes