Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9e862af5cef737…

MALICIOUS

PDF

199.7 KB Created: 2021-03-23 08:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 5fe00ed8498999f6154d31a38668ab44 SHA-1: b1a1c3b4fd4cacd2a644f1f6a89ccf2d0d0ee7f1 SHA-256: 5d9e862af5cef737e23a21768a8caf938de72edc1f632ade66e825be05422a9e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to redirect users to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://golowaki.ru/award?keyword=academic+vocabulary+in+use+edition+with+answers+2nd+edition+pdf PDF link annotation
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/db5ea.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/gixew.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/toremevuw.pdfIn PDF document text
    • http://vazewuxu.mywebcommunity.org/asvab_practice_study_guide.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/camera_scanner_to_apk_pro.pdfIn PDF document text
    • https://kobipisi.weebly.com/uploads/1/3/4/3/134312725/0828dc67.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/kawifizas_xolob.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/gezetega/62689882764.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/aprendizajes_clave_para_la_educacin_integral_educacion_primaria_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/sanozu.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_300d46eb0d224a67bae25c924cd2cd27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/computer_skills_cv_template.pdfIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_21625a1101bf47738c85d3c5ba472179.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/qld_free_to_air_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/rebizoxunul.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_7b8f0ed6b3844eddb19f8f46288258d3.pdf?index=trueIn PDF document text
    • https://965bd944-310b-4209-a71a-d16e45aaced4.filesusr.com/ugd/5f02e6_329a026e01114504974e3fdd6571959b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/real_estate_appraisal_exam_study_guide.pdfIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_7d862690d027482a88423d104a79618a.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD94 5908 bytes
SHA-256: 7935a2b520cc4f77f0a9c9e437db349e4683e578717778c6b3dac781a9a48458
font_01_sfnt_off0002d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1A4 12436 bytes
SHA-256: a29ab07a679271b34689610c2cc27a39d34cf6726b7dfe9908dcbbba1e979984
font_02_sfnt_off0002fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB26 16148 bytes
SHA-256: 9210f4d56a2d0e868c92c8f3d69665b65103c4cbe8eccb0746292756ebfacc8e

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