Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b5a5cb86c39bbc…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 19:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9fde7f096022a56887339023e9a5e540 SHA-1: a661ed4cc654dce797b45e750cffab2aad46eb08 SHA-256: 85b5a5cb86c39bbc06d87739602b65b7565b982a7ba32d9e46d4e982e476df28
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'guide'. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pelibifir.ru/wix?keyword=one+night+in+karazhan+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5fc770a8380a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496402/normal_5fe221db4ea04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60153a5c2fb0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_600bf150c5a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_5fd85bad3fecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417664/normal_5fef8bde2bb6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5ffe49bcdf68f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffddf4a2e302.pdfIn PDF document text
    • http://wirajamosilun.22web.org/35396479446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374517/normal_600253a2b6b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_6023d10a7cdc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_601faae9d9b3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5ffbb4ab20ab4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456671/normal_5fe1b0e2a6664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/32971567990.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ethan_allen_tempus_fugit_grandfather_clock_value.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/45462593163.pdfIn PDF document text
    • http://kolavosenake.rf.gd/i_am_thoughtful_guy_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/gerudimuposefolaxefuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/perdido_street_station_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/45017989707.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/south_carolina_drivers_manual_read_aloud.pdfIn PDF document text
    • http://ditajizuru.rf.gd/jabufetumepexukom.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/plague_inc_fungus_normal_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/91266274657.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/91268703845.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 5016 bytes
SHA-256: a5795c2ebb95f9638cb57040ab7b8c61e4571535d41ef3fac83d387961b55710
font_01_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 10652 bytes
SHA-256: 34955dfed8e7a8ed69187172547f029df74030009a4d76f11c3457257c8cb832

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