Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b9daf3fbedfa6b…

MALICIOUS

PDF

81.2 KB Created: 2021-03-27 23:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24841f14f188b81ec2ddfe5ab6fdc5b SHA-1: 2c0cc8ac6ee3149d5398d148e80dd6d760b87fdb SHA-256: 39b9daf3fbedfa6bb5f6dc6bc5f7fdf4af406c641ceca6152b136b1a6064648c
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to academic reporting, likely to direct users to the malicious URL. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=how+to+report+levene%2527s+test+apa+style
    • https://static.s123-cdn-static.com/uploads/4425230/normal_6007ea9ee79d5.pdf
    • https://cdn-cms.f-static.net/uploads/4495271/normal_605b33c9184ae.pdf
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a99e47ecf.pdf
    • http://dabinepoj.mygamesonline.org/anelastic_relaxation_in_crystalline_solids.pdf
    • https://witetalujoloxof.weebly.com/uploads/1/3/0/7/130740434/1738654.pdf
    • https://pukapukipek.weebly.com/uploads/1/3/4/6/134636258/c3003df4735.pdf
    • http://suziterunedoloj.sportsontheweb.net/what_punctuated_equilibrium_mean.pdf
    • http://fukijuwevo.getenjoyment.net/74979561873.pdf
    • https://degetopej.weebly.com/uploads/1/3/4/7/134727915/difarumamaxosune.pdf
    • http://bigijawiv.scienceontheweb.net/action_research_in_education_topics.pdf
    • https://pujuxapalijened.weebly.com/uploads/1/3/6/0/136009243/bopebuvisijerir.pdf
    • http://pebunoguge.mygamesonline.org/33884843294.pdf
    • https://jutosavaneje.weebly.com/uploads/1/3/2/6/132696077/kewogujaxutakimi.pdf
    • https://cdn-cms.f-static.net/uploads/4449987/normal_601bb31439c85.pdf
    • http://zanapipok.getenjoyment.net/dedejamag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bokofapig/photo_card_maker_templates.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_a0b58cb098114b2cbfff51483dc087c1.pdf?index=true
    • https://s3.amazonaws.com/zewimu/81720884724.pdf
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_2b29955be536454badcd6da05170e772.pdf?index=true
    • https://s3.amazonaws.com/borokegujuzero/sigowijegelu.pdf
    • https://s3.amazonaws.com/bibejovixapis/39542617860.pdf
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_5d2f24b7193c4253a04ad9e5ad5e0fe4.pdf?index=true
    • https://s3.amazonaws.com/xarojapi/jujigotutedapasawaw.pdf
    • http://wewamamewiler.atwebpages.com/south_african_curriculum_vitae_format.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f201.bin
31e02654b84fb57b8fc94d9cdcfdb359950d3aebe5f36755056ae43b3f8414ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 4804 bytes
font_01_sfnt_off00010276.bin
75a4647db27919176fd67adb8af72a45e9f4f8a2ac258fbe2e0e03a35b380e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 10720 bytes
font_02_sfnt_off00012750.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12750 4324 bytes

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