Malicious PDF — malware analysis report

Static analysis result for SHA-256 c554e68673d8f872…

MALICIOUS

PDF

70.0 KB Created: 2021-04-21 20:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f02e8633d34e9fc8861c8c368c7f2f SHA-1: 728a9583f9962a1564097720671bb1efdd8b2a99 SHA-256: c554e68673d8f87275c59e0f83857042312704960d3c08d62fb3aa1cb7529f18
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a video game manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=wizards+and+warriors+3+nes+manual
    • https://cdn-cms.f-static.net/uploads/4408170/normal_6028b216f034e.pdf
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5fd1801187f9d.pdf
    • http://lakujalinifibo.mypressonline.com/rirufagakasata.pdf
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5fdb541020c57.pdf
    • http://vumajuzatijerak.getenjoyment.net/mysql_w3schools_download.pdf
    • http://tepugorotewole.medianewsonline.com/ruvikemodinadozenalaxepug.pdf
    • https://cdn-cms.f-static.net/uploads/4475727/normal_60686e7d40ba4.pdf
    • https://cdn.sqhk.co/mivadunoxo/hihimje/budarorux.pdf
    • https://cdn.sqhk.co/naziwixolagu/ZjQjtje/burovazijananexoguniwadup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_e113a450426d4a9a957ad9781a46ef37.pdf?index=true
    • https://s3.amazonaws.com/gizonukorad/international_accounting_standards_2019.pdf
    • https://uploads.strikinglycdn.com/files/cd556fdc-c5b7-4145-bd22-8b5e32295ae8/nabixegi.pdf
    • https://s3.amazonaws.com/wowonesoribu/tafadesivifewumub.pdf
    • https://s3.amazonaws.com/tokudapele/is_the_fender_champion_20_a_good_amp.pdf
    • https://uploads.strikinglycdn.com/files/9adf006e-2189-489a-8eb9-d4d7679be0bb/how_fast_is_a_yamaha_fz6.pdf
    • http://putunoxixowelo.atwebpages.com/5923772402.pdf
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_fe1b7677f2f2483991f3b53321c082b8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0a6a96d-63ca-4446-a046-b6ab5ace67a6/arc_welding_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/2a4c1f0d-1683-43a1-9951-2a75982e6242/american_society_of_mechanical_engineers_publications.pdf
    • https://uploads.strikinglycdn.com/files/242684b2-d53c-47be-beea-1cd28850043d/47215854445.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_off0000d236.bin
6b965ff3c7b7ccebc121ae9473c354e707e9fac00e19585fa7f296551d15d1df
pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 5288 bytes
font_01_sfnt_off0000e43a.bin
29055fe9e267d93ca95dc513b9db9f5a17a7b09e434d3188fc53ae73736710f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 10960 bytes