Malicious PDF — malware analysis report

Static analysis result for SHA-256 829312f65ffce6dc…

MALICIOUS

PDF

81.2 KB Created: 2021-03-05 03:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 94cb67bb5bfe3e06d24d50f955355e17 SHA-1: 5d89fbe9ae899ebae1ffc129cb1cf7342c8f6db9 SHA-256: 829312f65ffce6dc3b17313703da11857f84224ded39de0372995b602776aaa5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it for an 'award'. No scripts were extracted, but the presence of the malicious URL and the nature of the detection suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/award?keyword=taking+sides+clashing+views PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409602/normal_6006f0ed2579a.pdfIn PDF document text
    • http://mivejuvididu.66ghz.com/ryzen_3000_memory_overclocking_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5fed185290700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5ff920968e860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_6022a36beed93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473359/normal_6009680a56817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_6006cfe62f4bd.pdfIn PDF document text
    • http://lajenasuwo.iblogger.org/tuxedipowivisirir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_60241a4bbe21d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_600e330ca359e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_603013ecca280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fc675e188a6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d477ebe1-535e-4aa6-89c6-655ae1e1b5fe/gurulikadekuvedefasusekox.pdfIn PDF document text
    • http://sajurewe.rf.gd/facility_maintenance_schedule_template.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_d78abefa0b6143c3aa4fd2720e021d53.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_62dc7b429f584c46ad55aca0451c14f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/feba193e-e0f4-47a3-80b4-97d316d5c13d/actividades_de_lectura_para_nios_de_primer_grado_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba93414-0782-45d1-a96c-9ba57f1ddff5/sentry_safe_wont_unlock_with_key.pdfIn PDF document text
    • http://zezazemana.epizy.com/17360892202.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_79f42ee8a3514e47827b76521ee742a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e8ea9c-79cc-42bb-8ef6-2d71d62be05c/dewar.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_79a0c6df49814ad69911d9e29ea9aa4e.pdf?index=trueIn PDF document text
    • http://bugavujozi.epizy.com/24606557693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb0fac2-a7be-4f2f-b03e-9a8f704b1c92/cat_in_the_hat_costume_amazon_prime.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_off000100dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DC 5272 bytes
SHA-256: b2c42db314d36d107a7c50f913ddc8c8db9aaa067e95cfbd9349e26e9388fe40
font_01_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 10880 bytes
SHA-256: 126219642fbb8bf2737dba6c9ad2977d3e46d09ce35190e2352a161a04e6caa9

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