Malicious PDF — malware analysis report

Static analysis result for SHA-256 5235f07d863aaa03…

MALICIOUS

PDF

104.8 KB Created: 2021-05-22 02:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45535f1a0deca8625897d5e8a9a9cb47 SHA-1: c5b3c8260c3d1a27029ef61a4cde494d39c709cf SHA-256: 5235f07d863aaa036475e6d5d27350fe316214e8f734948da2196e96c467e196
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=9th+class+maths+textbook+pdf+download+state+board PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484355/normal_605d6ed078bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fd98a0dcef75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_604d18d2575c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6054791d317c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_60642f866a6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_6022bd63e4611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fc757e737beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446634/normal_605854826d167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xukonakefules/colouring_sheets_for_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b669b9-2188-4444-9719-47a7e7dfdd8c/sony_trinitron_tv_red_light_blinks_5_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0a5d39-4b22-47ca-8c18-f175abaf7870/33539455865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f1224e-137e-475d-be95-f45ec13ad119/adobe_elements_2020_price.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/sperm_analysis_report_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2735c7d-3175-40d0-ab34-b75253e49a62/schwinn_exercise_bike_170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac8ddb7-aa8f-4cd7-9fdb-e3264510f9d7/how_do_you_reduce_yeast_in_your_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d245ea71-2ab6-4a11-a992-2a548da4aee1/the_art_of_racing_in_the_rain_dvd_at_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/thinkpad_t490_spec_sheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13530 5560 bytes
SHA-256: 75de7de8ac25e6cfa49143bf0fef214b2c748ca0d073dd763a542d4f65205d8a
font_01_sfnt_off000147f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F4 7508 bytes
SHA-256: 4a176243621b88c96e94d16ccf2e141c581b5225ba61a04406574e4b079a4996
font_02_sfnt_off00015f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F36 11864 bytes
SHA-256: c711fabc22259c232c7eb75ba441d7689b2b4ae80d47fc66ca822d21f8e0ec5a
font_03_sfnt_off0001876f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1876F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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