Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c99b3e4ef9f387…

MALICIOUS

PDF

215.2 KB Created: 2021-03-19 20:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b43d9bb1cde6a0358f20c28950e06ea SHA-1: cddcde5fcf8aefda4764857928eb3a469532f87b SHA-256: 06c99b3e4ef9f3873e385ea5e4040091ecb723cdc347de4cc0d56b47c03c53bc
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as benign, but others are unknown and potentially malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple embedded URLs suggests an attempt to redirect the user to external resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://cdn-cms.f-static.net/uploads/4454809/normal_602f507125d13.pdf In PDF document text
    • http://copyrightproblem.com/bhagwan_ki_photo_kare61adn.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/gakafemawakivewovenibilar70i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_6038d21dd8916.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/cicfpfe/traductor_lengua_maya_a_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/rezebarowed/SjgihHT/alien_zone_plus_unlimited_everything.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/gXZhhjj/healthy_breakfast_with_eggs_and_sausage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456122/normal_5ffd433c3f08e.pdfIn PDF document text
    • http://shop50off.info/dusisopuronuvosex2z6b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dN4lCoxrs6M/wb?keyword=how%20many%20volumes%20in%20berserk%20deluxePDF link annotation
    • https://uploads.strikinglycdn.com/files/e8732402-8024-4f13-91e1-23e6ac5ff2cc/zugaxubido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b6207f-89c7-42cb-b9c2-4e8a51e6044b/bubosetosozupizisopubo.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/steven_skienas_the_algorithm_design_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bonarusegusezizugototor.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/brownian_motion_worksheet.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_6a9c56670f4544ef872bfd59b26627e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96baf588-9b52-42cd-98f6-e0b27cbe873d/zozuvulowoteserewow.pdfIn PDF document text
    • https://1d78cdce-0032-4a75-b9f1-030f6b068c24.filesusr.com/ugd/32f660_e7b6fa032b4e46f996ed71d18d77c4fd.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_6caa1510ee994a57be075f7e4042099c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00014f6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14F6E 153356 bytes
SHA-256: 518ff7b3841678478aa074a72ae171a52a24c67c18b5d7e0cdf5a3e897824d95
font_01_sfnt_off0003158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3158C 5460 bytes
SHA-256: bb4a52504ddb7c6e48d36f22ec037920e4020e71d036d5cdd518fb0dec790fc3
font_02_sfnt_off00032817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32817 11468 bytes
SHA-256: 7a372cfc1109fd4a0517f6e354f92aaf7f40eb0ca9a2fd9d52cce891d3250f0f

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