Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3ae4d343de6afa…

MALICIOUS

PDF

82.3 KB Created: 2021-03-01 18:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0bb982f9d78c3fc88f3692a97dc53d72 SHA-1: d046db67b94c51a82d6dc6dbec4a4470dffa21b7 SHA-256: 1b3ae4d343de6afa59c76313a8de43f58b148fdf4a424c9ef4fe6b41a60b9afb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, appears to be a lure for a product, likely to trick users into clicking the malicious link.

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://resalured.ru/strik?utm_term=kemper+profiler+stage+floorboard PDF link annotation
    • https://cdn.sqhk.co/diratukuz/UMiIMce/6201678795.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/roadmaster_24_inch_granite_peak_mountain_bike.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/panasonic_kx-t7731_phone.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/lapuponogipuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_602e4b9943d92.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/iib4hij/dopujisiranoji.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/Niatgem/63612646867.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/hjjgjdS/edexcel_igcse_business_textbook.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/english_conversation_questions_for_beginners.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/what_is_the_difference_between_dog_and_cat_frontline.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/dedinavesute/kijilix.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/71776541239.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/all_bearing_types.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/33219476509.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/employment_application_form_malaysia_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/50408825431.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/acid_rain_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/92559165281.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_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 5472 bytes
SHA-256: 3b92c212818997565bbfb212a2c3b74d5082be3177149aaf7afb7ee40f934752
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 10844 bytes
SHA-256: ca40c93b6c6c789e934bff384b60e6332bdaf1f29efa00c49d4de951b244b44b

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