Malicious PDF — malware analysis report

Static analysis result for SHA-256 be08af798ee8907b…

MALICIOUS

PDF

78.4 KB Created: 2021-03-08 05:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07d378f0f12049e527e52c7dc16efe56 SHA-1: b112d3cd7bad28169ba9365c9c513a99eca209f6 SHA-256: be08af798ee8907bdbc9892c73848709d3bfe5d5e7edd5df1a88f91309cfdd43
96 Risk Score

Malware Insights

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

The PDF contains a URL that appears to be a lure for downloading an application, indicated by the 'keyword=download nova launcher prime apk latest' parameter. The presence of multiple embedded URLs and the ML classifier flagging this PDF as malicious strongly suggest a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=download+nova+launcher+prime+apk+latest
    • http://fowusurenizono.iblogger.org/mukivami.pdf
    • http://ruzoboxilotazex.22web.org/business_canvas_model_book.pdf
    • http://zarabatyivat.ru/fefavatawixjaj3z.pdf
    • http://jetiloxabutu.iblogger.org/adidas_watches_womens_white.pdf
    • https://cdn-cms.f-static.net/uploads/4413346/normal_601a6f62b5fda.pdf
    • https://cdn-cms.f-static.net/uploads/4408485/normal_60388d0ff3100.pdf
    • https://static.s123-cdn-static.com/uploads/4413112/normal_5feaf99cf323c.pdf
    • https://cdn-cms.f-static.net/uploads/4366664/normal_601424018a931.pdf
    • http://esagafow.fun/mujalekonuzudigad3ep86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://keximidurowu.rf.gd/craftsman_weed_eater_tiller_attachments.pdf
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_b28e9d9d16ad4095b12e1b28fa8b5c5d.pdf?index=true
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_9a63700014094799aa8abd593897f9a0.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_c9c51c0e22434e8eb1b014d5e400ac3d.pdf?index=true
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_d2a0b268029f4aeab18ec5ff189b75a9.pdf?index=true
    • http://zawopomosegasax.rf.gd/bulb_replacement_guide_osram.pdf
    • https://uploads.strikinglycdn.com/files/8390185c-2917-4a0a-a775-3c79e6e0d6f1/maiden_voyage_sea_of_thieves_guide.pdf
    • http://mutidulofof.epizy.com/xitinisadup.pdf
    • http://mujigivufutufu.rf.gd/22795972471.pdf
    • https://uploads.strikinglycdn.com/files/f728e796-79e8-4c52-9c20-201fbd835c6e/how_do_i_set_up_voicemail_on_my_vtech_phone_cs6919.pdf
    • https://uploads.strikinglycdn.com/files/8cea4c6a-8834-42de-b99f-081a65ca38e1/86471202494.pdf
    • http://jutekezas.rf.gd/love_and_respect_conference_dvd.pdf
    • https://uploads.strikinglycdn.com/files/58b5ef33-a62e-4725-ba21-e67da244dfda/ruxexup.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_a39b4b1ecdc54224b4b1f9b8049ea0d3.pdf?index=true
    • http://tisiwiruligeg.epizy.com/testbook_august_monthly_current_affairs.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f8.bin
31f80964bf266602ba7231645b752a03abc0f49c81e34508d71b96996ff73ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 5528 bytes
font_01_sfnt_off000107b4.bin
b49f97eab1c78db6358c4610fd048fc3c6827423e669eea5fff31d181a91ff31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 10552 bytes

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