Malicious PDF — malware analysis report

Static analysis result for SHA-256 8541aa50bf43c80a…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 02:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fed63afc34c3820f5be671643603004 SHA-1: 829ee9745b704717be259c6bb8df2fe11a33bc9f SHA-256: 8541aa50bf43c80a4d0af3e851488f371c599989ff9219794278fb0db99df4ce
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and multiple other unknown URLs were extracted. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a game trophy list.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=sword+art+online+lost+song+trophy+list
    • http://registrat.space/97929281358a7llh.pdf
    • http://item-get.top/59636355157ly9d6.pdf
    • https://static.s123-cdn-static.com/uploads/4445879/normal_5fe3bbf84e6f6.pdf
    • https://cdn-cms.f-static.net/uploads/4366664/normal_600f243d8b55e.pdf
    • https://cdn-cms.f-static.net/uploads/4450147/normal_601d2d08b9646.pdf
    • http://jadogaxarabu.mygamesonline.org/what_is_in_the_glycolytic_system_carbohydrates_are_breakdown_into.pdf
    • http://tihefers.online/wavimesolixamekouyli.pdf
    • http://clubstore.pro/davis_drug_guide_online_discount_code1sv46.pdf
    • http://sallehub.xyz/libros_para_colorear_princesas_disneyoziwt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0cd3f6a9-02a9-4a6a-afdf-2d2554fc194b/kegejefopejimanow.pdf
    • https://uploads.strikinglycdn.com/files/ff4ce402-1f83-44c2-baa1-bfe3a392810c/83688746794.pdf
    • https://s3.amazonaws.com/sazomo/is_your_ip_address_personal_information.pdf
    • https://uploads.strikinglycdn.com/files/ec196247-0f6b-4e81-a008-5e65b40122c0/singer_3116_price.pdf
    • http://kojuvurapamox.myartsonline.com/58672386766.pdf
    • http://lazuletezofik.onlinewebshop.net/garmin_nvi_1490_update.pdf
    • https://s3.amazonaws.com/vukusa/chichen_itza_self_guided_tour.pdf
    • https://s3.amazonaws.com/dudigonifu/zizizogenigiwumivuvemolib.pdf
    • http://likutolejit.onlinewebshop.net/flysky_fs-i6_2.4g_6ch_transmitter_and_receiver.pdf
    • http://negumigimewote.onlinewebshop.net/8151389157.pdf
    • https://uploads.strikinglycdn.com/files/1b245b9b-2b9c-4406-aa09-0d0990b1c1c8/60891875594.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_off0000f1c9.bin
88b16f7168948fef993c559288e0f74bca44a62fdcf9e49cfe6e51d098d5b67c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 5520 bytes
font_01_sfnt_off00010499.bin
7a74d9b12a6b251ebde1eedbd533e8cf1b0f2ac474c6078ff2e37d789728e958
pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 11360 bytes