Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5073b6105b80351…

MALICIOUS

PDF

87.4 KB Created: 2021-04-01 04:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc394e8c53b242b54579f1ba6eb0de26 SHA-1: b8a3d23479fe841f369059f3c1ea7e4d3523359d SHA-256: a5073b6105b8035174e795ea9a7fd1c333ed46889be3c16df96128b425d08bf7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to trick users into clicking it by mimicking a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pelibifir.ru/award?keyword=summertime+blues+chords+pdf
    • https://cdn-cms.f-static.net/uploads/4420441/normal_600a790d24ed8.pdf
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5ffcb61bc5a70.pdf
    • http://kewegagibemidaj.22web.org/myron_mixon_recipe_book.pdf
    • https://cdn-cms.f-static.net/uploads/4405409/normal_6019a854106e9.pdf
    • http://tikovg.xyz/collision_analysis_worksheet_answers_physics_classroom747ic.pdf
    • https://cdn.sqhk.co/kulobuwaxegu/ggghajb/photo_lab_pro_photo_editor_apk_cracked.pdf
    • https://cdn.sqhk.co/faxinomitux/ih3hahe/boo_2_cast_youtubers.pdf
    • http://kotumixevana.22web.org/sigamawe.pdf
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fec41181eba4.pdf
    • http://lnstagramsupportingcenter.com/jamobusitelabesipd8be1.pdf
    • http://idealica-official-it.website/what_is_sap_hana_cloud_connector_used_forrr4bw.pdf
    • https://cdn-cms.f-static.net/uploads/4409610/normal_605d6af7c3591.pdf
    • https://cdn.sqhk.co/mekurapiw/iajdQjb/fundamental_attribution_error_examples_at_school.pdf
    • http://blekrossi.ru/97844442686avnbq.pdf
    • https://cdn.sqhk.co/zuvaworizon/eqhhjcw/zonusumasexelinoweja.pdf
    • https://cdn.sqhk.co/jagapifa/bbyigii/command_block_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4374207/normal_6055be7c8b929.pdf
    • http://inter-kalinka.ru/67597384493z3d8m.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_604fbdb2cc28c.pdf
    • https://cdn-cms.f-static.net/uploads/4445130/normal_5fd7c40c38f60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wubulinefoz.rf.gd/dabukikobedobosu.pdf
    • https://uploads.strikinglycdn.com/files/cd1e88da-2036-464b-b4a2-2b1f875e34b0/resumen_del_cuento_la_gallina_degollada.pdf
    • https://uploads.strikinglycdn.com/files/9b251170-1a01-4eb5-b6f2-2a4fb5e8c602/kibufebev.pdf
    • https://uploads.strikinglycdn.com/files/1c441e0d-c1bc-4063-9cff-0d6e306cd9db/what_does_it_mean_you_dream_about_having_a_baby_boy.pdf
    • http://pigozezidum.rf.gd/landscape_bond_form.pdf
    • http://jetufijat.rf.gd/1078302305.pdf
    • https://uploads.strikinglycdn.com/files/b105aa5a-a97b-4c73-a93a-b61a199246a2/80585159995.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_off0001020c.bin
4e231525b9681ba0eb271ae4b9e332757c513ac1ea91726635f87ca2defeb0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 5428 bytes
font_01_sfnt_off00011450.bin
9e070d5838e866bc6b71ae1127e2c815fba1980bbd9ad6b952f58fad4b3e976a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 10832 bytes
font_02_sfnt_off000139af.bin
3d33b3ac7fa1b74acea5cd2d94d4f47cba6b284dcd285b38be67b2222a253b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139AF 16648 bytes

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