Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9e5909a7e43a77…

MALICIOUS

PDF

77.4 KB Created: 2021-02-23 01:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: be27bf85bdd9aea5d28d9fc8252cf34a SHA-1: 8ed27db01618592218a8341fa5a50094718bb997 SHA-256: da9e5909a7e43a7719afab1a805023fe0c0fb204ec1773b5c89f3511af3d71b1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'Kenmore stacked washer dryer' and 'wkhtmltopdf', suggesting a lure related to product listings.

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://seumenha.ru/123?utm_term=kenmore+stacked+washer+dryer PDF link annotation
    • http://walkover.me/51856153075wkj7x.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/xjgjghp/99360283719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480162/normal_5feb683c99ae4.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/RiamidN/8654977237.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jjUjjia/37160934631.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/e30RdkG/58979692331.pdfIn PDF document text
    • http://milanbeachs.space/how_to_slow_cooker_liners_workkmz50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5fed26b632c17.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/EjidFUi/idle_defense_dark_forest_mod_apk_unlimited_everything.pdfIn PDF document text
    • http://teagreen.space/729282851952xg9j.pdfIn PDF document text
    • http://migerov.xyz/523439096993r5jg.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/LBig996/strike_fighters_attack_pro_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/wiajfOE/98412950669.pdfIn PDF document text
    • https://cdn.sqhk.co/pokemazikera/higfjjX/64210078909.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxemetakol/icgcPij/stumbled_off_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/Ugdha5R/makejufurusamomujabasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jeworurowam/55546842200.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/genogram_templates_for_microsoft_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 5112 bytes
SHA-256: 40d60585862ca82abf0b1d1786c6948da0ceb5cd143a19ed5a02c8436f3887b0
font_01_sfnt_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 10596 bytes
SHA-256: 302337ad63dfa39c31ea613d219a6051307fb89a3d69d3df33dffc5b0fcb0692
font_02_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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