Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa8f06196b9b833…

MALICIOUS

PDF

174.2 KB Created: 2021-03-17 11:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4179c070753d8df70675133e51971f SHA-1: d5bd4d2f7b57ef652dca5633640c08bf6278e34f SHA-256: 9aa8f06196b9b833130cec53195cfed6c21e586e943ed317230f6cc8c7d8f896
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://bologen.ru/award?keyword=girl+name+list+in+marathi+pdf', which is likely a phishing lure. The document body is heavily obfuscated, but the presence of the malicious URL and the PDF structure strongly suggest a phishing attack delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/award?keyword=girl+name+list+in+marathi+pdf
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fe420bb6e336.pdf
    • https://cdn-cms.f-static.net/uploads/4449417/normal_5fd27f40ecf94.pdf
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdfbcf085f21.pdf
    • http://meetsoda.pro/hungry_shark_evolution_para_hilesi_apk_cepde5yxpr.pdf
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/7888794.pdf
    • http://dombitarf.ru/mepuguxagejedafidijolusatydwz.pdf
    • http://axacheat4.xyz/how_to_change_battery_on_apc_smart_ups_750lkrnb.pdf
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/womodelezel.pdf
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/4600815.pdf
    • http://espacecmb.xyz/que_es_el_modo_de_produccion_capitalista_y_sus_caracteristicasi4vvi.pdf
    • https://cdn-cms.f-static.net/uploads/4417817/normal_6014d656d86ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://kesugoda.rf.gd/simplifying_algebraic_expressions.pdf
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_86142609eed941babba0d672f5b2578d.pdf?index=true
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_253b6f32afd5429b927d5c61348782aa.pdf?index=true
    • https://s3.amazonaws.com/towutoginadivu/25492414472.pdf
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_920ee38753b14343aba940e73a2769ff.pdf?index=true
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_2b2f2c0c447b40e98260c23006618ea1.pdf?index=true
    • http://zibinafo.rf.gd/manual_barrier_gate_malaysia.pdf
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_f3cc269df71f4699b853bd822bc58226.pdf?index=true
    • https://s3.amazonaws.com/pasawexawinogad/android_draw_rectangle_outline.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_off0002562c.bin
220885a9e13bab08674462f0d688d39dedb32818a6e4a5eeaa43103f7d31ebbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2562C 5312 bytes
font_01_sfnt_off00026813.bin
0c3788d3d31fcdfc64e904d88b9b38c073d7d0bc251d2931ebd236df4f8fa588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26813 13356 bytes
font_02_sfnt_off0002935a.bin
a8725d42292c517f69f83fffe864a2305a58b7d14c24ebe5108ee9370362e1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2935A 6068 bytes

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