Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe3350c0ad202e0…

MALICIOUS

PDF

86.0 KB Created: 2021-04-04 03:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04f4576bd88ffcbb54006cc10fff4f8 SHA-1: ec5355d142e7a3262ddf6261b510fb04f95d0779 SHA-256: cbe3350c0ad202e0b1a4ebbb360b04ba2dbf8898994882d617557f52453c4454
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 phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of the external URI is a strong indicator of malicious intent.

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://vilenefex.ru/award?keyword=rachmaninoff+vocalise+piano+pdf
    • https://cdn-cms.f-static.net/uploads/4467950/normal_6049119c822a7.pdf
    • https://cdn-cms.f-static.net/uploads/4407749/normal_6048240d665f1.pdf
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fc98d0bf018c.pdf
    • http://depusapo.mypressonline.com/ginizeze.pdf
    • http://bizowokare.getenjoyment.net/renault_talisman_prijslijst.pdf
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ffe2923d1427.pdf
    • https://cdn-cms.f-static.net/uploads/4452851/normal_601d965d0ba02.pdf
    • https://cdn-cms.f-static.net/uploads/4371247/normal_605610ec7a1bd.pdf
    • http://javosewo.sportsontheweb.net/writing_task_2_vocabulary_download.pdf
    • https://cdn-cms.f-static.net/uploads/4452850/normal_5fdc56d8773a6.pdf
    • http://nujijaj.getenjoyment.net/jujujopubi.pdf
    • http://zikewexer.scienceontheweb.net/baby_bjorn_potty_training_bundle.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizuluworafid/what_is_the_role_of_hardware_and_networking_engineer.pdf
    • https://s3.amazonaws.com/limepusotanal/ar_15_upper_receiver_dimensions.pdf
    • https://s3.amazonaws.com/tufitijinexu/webudegusijovabaluritej.pdf
    • https://s3.amazonaws.com/jedaxopopuko/environmental_chemistry_questions_answers.pdf
    • https://uploads.strikinglycdn.com/files/455a89a6-eb85-4333-9c37-860520cd194b/the_percy_jackson_and_the_olympians_titans_curse_the_graphic_novel.pdf
    • http://gudonuwoponiri.rf.gd/carrom_pool_game_uptodown.pdf
    • https://s3.amazonaws.com/fomudebipefasu/vepepasegem.pdf
    • http://dibixobijowib.rf.gd/mivagoguvedodedurix.pdf
    • https://uploads.strikinglycdn.com/files/f1c12889-f20c-47d6-a85c-1f4d40fac088/why_did_they_stop_making_percy_jackson.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f508.bin
f7e744f37b5b3dd3f65c401997a9afed2e5735e0e98102ed2351db8204b50253		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 5368 bytes
font_01_sfnt_off00010736.bin
4f48f5de9203e9ad7e0fa670eb38c769e7e3ce8ef11f88d3ee1921ad5022a417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 15076 bytes
font_02_sfnt_off000135c2.bin
3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 16096 bytes

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