Malicious PDF — malware analysis report

Static analysis result for SHA-256 257143710dc614e2…

MALICIOUS

PDF

92.5 KB Created: 2021-03-10 10:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d30b095d87a95db0141a42ccfd40f795 SHA-1: 8e941d7cbd6eeb8bd11acc6b166c9b3ec68aef91 SHA-256: 257143710dc614e21e910a93f97eac8207d5cb29b2f3283fe11bc2c52c9617ac
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=market+leader+upper+intermediate+progress+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391340/normal_603821a917063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_600f4e7180552.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373757/normal_60039adb24a79.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/IBii3jf/best_free_wifi_calling_and_texting_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_60273af6ed70d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_5feb7fe8037e0.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/foYgfig/elf_dwarf_hybrid_lord_of_the_rings.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/tintern_abbey_analysis_nature.pdfIn PDF document text
    • http://sijowusim.22web.org/40192103765.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexeban.rf.gd/fajodevezodenobewajago.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/saxezipuxumotepobedu.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/92764526945.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/bissell_proheat_2x_revolution_pet_pro_carpet_cleaner_costco_price.pdfIn PDF document text
    • http://jabowedufup.epizy.com/40486491824.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/kitedorubamogadilopopak.pdfIn PDF document text
    • http://zopefunexot.epizy.com/35345502812.pdfIn PDF document text
    • http://pumajuxav.rf.gd/can_indian_chartered_accountant_work_in_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/crash_bandicoot_warped_apk_android.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/stevens_320_field_security_12_ga_28_barrel_5-rounds.pdfIn PDF document text
    • http://nakulugexogi.rf.gd/minn_kota_riptide_terrova_112_87.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_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 5212 bytes
SHA-256: 9313c4e276882c47e91230fb142318edbd14a6536df10704f9561ac9c22df541
font_01_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 5440 bytes
SHA-256: 349dcdf817afcd21775523c1ef074ae3d7c56c6d69985c2406bfde940603533b
font_02_sfnt_off000139c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C7 13108 bytes
SHA-256: 6d483bd166bfd4f47df70c8c5e24e055363349b1e8e3b997c8f76da92e3be96a

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