Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e385938a3be1ab…

MALICIOUS

PDF

90.4 KB Created: 2021-03-10 19:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 51b3738243d04a9fd05d79bd2d19bb4c SHA-1: 5242db4317fb55d9dd9177522e8545588312fbfb SHA-256: b3e385938a3be1abed6251b2e90748ff060da1af27a6be0dff0eda32fe54228e
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 0.9991

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://midufefew.ru/123?utm_term=flow+cytometry+software PDF link annotation
    • https://cdn.sqhk.co/vumuwilaj/1lBZhfl/wovuniwejefufegeketibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_603a1ecbe643a.pdfIn PDF document text
    • http://urro-hu.com/the_curse_of_la_llorona_downloadme2s2.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/gxFidUB/auto_response_outlook_iphone.pdfIn PDF document text
    • http://center-san.ru/61975886980es3i5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fe63228407c0.pdfIn PDF document text
    • http://strgb2.ru/netenobazojip9x63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_6044f5cecf851.pdfIn PDF document text
    • http://disozire.mygamesonline.org/bmw_e46_auto_transmission_fluid_change.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fde58fe412f7.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/hjjhAgg/6567221338.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jcM6hi5/45848219507.pdfIn PDF document text
    • https://cdn.sqhk.co/bojiluxenome/ehfiaWl/abc_song_nursery_rhymes_dave_and_ava.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/sazixipame/fafageked.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/66559828692.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/7057001083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645bf5e7-12d9-4044-b542-a09879a370fd/sagapebuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/brush_lettering_worksheets_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1697be7-3ffa-4e57-86d6-0317227b6015/how_to_fix_my_dirt_devil_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1717b01-750a-4e7c-95ea-738033e196a2/arbys_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e42790d-b97d-41a9-a600-66940dbe9c99/what_is_the_best_camera_setting_for_indoor_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/ameda_platinum_breast_pump_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d60a98-d949-4d8e-b3b6-bde3c62b0696/doxakolagezudototipukij.pdfIn PDF document text
    • http://mawokale.myartsonline.com/how_to_disassemble_a_graco_pack_and_play.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_off000122fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 5176 bytes
SHA-256: 0e240839642cd1fb3dbb1a572d12adbee4f4c376601140157a5a7c1e4fd2f578
font_01_sfnt_off0001349d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 11640 bytes
SHA-256: 874f738f03a63b70d4f96fe5f7052753ea989c48294b36320a384217a482b137

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