Malicious PDF — malware analysis report

Static analysis result for SHA-256 779ecf4f5f8960ed…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 08:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1c3e0afa3fc0ba6db58b0de25d588e34 SHA-1: 53ff8d3f3f8a6a789c7631379191747779bc81d7 SHA-256: 779ecf4f5f8960ed2fd5f19e8736d651678a539c099b9ece394a2396fe6d71ff
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 0.9996

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://mezovuduw.ru/123?utm_term=red+alert+3+full PDF link annotation
    • http://jirafka.space/ethical_hacking_course_books_freevju60.pdfIn PDF document text
    • http://azalea.store/balboa_hot_tub_operating_manual68oqb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462073/normal_5fca72b6649a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403263/normal_5fed6a49c1896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380525/normal_5ff1517e76339.pdfIn PDF document text
    • http://eeuuurrrrr.space/wubifofebeponasexijigus3xpeu.pdfIn PDF document text
    • http://baltika-trans.com/passive_and_causative_exercises49rcn.pdfIn PDF document text
    • http://123dutch.com/40849197820208bo.pdfIn PDF document text
    • http://kdghy.online/19582530644ur8oc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_3fbedfc4d3d043d4a26eb654a9d13061.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/baaghi_2_full_movie_video_2018.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_f650a6811bbf47f3b081f426187997ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf55e58-87dd-4530-bcae-4a14a25259d1/nike_air_force_1_valentines_day_2020.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_d761df53a7584b8a9d60e9c62d09d003.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/nefusanulebudovun.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/6681812715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a3874c-43e1-417e-ae6d-db75c886591d/james_baldwin_quotes_the_wretched_of_the_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4ce2b4-65d0-4227-9abc-289d0c7aef23/feguxedivuk.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/us_amendments.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_26c3fab2b10a4064bea5efa6f9bc5ae9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c2ceac-3d63-43ab-ace3-b13439b7aa31/life_fitness_95ti_treadmill_specs.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_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 4896 bytes
SHA-256: c2c3001cf8f001c9ea243b0fba9d61815c3e5b8442f6b466bdbb800f2ac177c2
font_01_sfnt_off0000fc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 11544 bytes
SHA-256: feaa22a73fbf4f8b40c5251e9e83be9a09041867c5ebed92555b734fcadcb05f

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