Malicious PDF — malware analysis report

Static analysis result for SHA-256 80515874e3b83e5f…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 03:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ab675d90f609c7e3f5194b8ff72aa884 SHA-1: 2c2a74c85ea0ca36a271638ae225707f989a7c2c SHA-256: 80515874e3b83e5fc9c390e10d6f8c6771ae7c8abe1515996bfdcfc6f53b4b4d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, disguised as a download for an emulator. This is a common lure for phishing or to deliver a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of external URIs further supports this. No scripts were extracted from this sample, but the overall structure and embedded URI point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/wix?keyword=oceanofapk+com+my+boy+gba+emulator+apk+free+download PDF link annotation
    • http://shop-onlinediscount.xyz/162209760107gshy.pdfIn PDF document text
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/soxux-zapujewo.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/e9bc931.pdfIn PDF document text
    • http://tehnopolis.org/cash_voucher_format_in_malayalam81rpd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5feda6a2a5bd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449012/normal_5ff65c1845cef.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/wikaxemetavizo_kamuwozozot_bitebob_sezamati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_5fdbde2791e3d.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/feborobegibew/nekazivibolulalomud.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/business_payment_terms_and_conditions_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/yandex_disk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/napalutatapapajanaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/vertical_line_test_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/ielts_writing_answer_sheet_model.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/r12_to_134a_conversion_kit.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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 5720 bytes
SHA-256: 0084c3e74f566e931d1f45d66d28e3032edf74f32bb8f7602cf7dc67d324dd20
font_01_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 10448 bytes
SHA-256: fa7b275c63b3dac43b299fa696be15d6d0af6850691bb7f76f623ce7f6884287

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