Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdcb58408da8323…

MALICIOUS

PDF

80.1 KB Created: 2021-02-24 00:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f4a8d8408d7981bf689e72228446d2db SHA-1: fe899dc427fd5298045786dd34d79e42ffb37c1f SHA-256: efdcb58408da8323bfde874b4b8f0f0f45c29a51f5b28b0ed069d21a76adfb62
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely to trick the user into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the overall classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=how+to+get+time+capsule+in+upper+west+side PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fc98ca7423bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485448/normal_60082495bb42e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5ff4262077b4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fec2274be34d.pdfIn PDF document text
    • http://cashbackmoney.info/agario_macro_hack_iosx7jj0.pdfIn PDF document text
    • http://katermore.ru/71131900819oc1um.pdfIn PDF document text
    • http://akfb.online/organizations_to_save_the_planetjkz5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418001/normal_5fc95ce614ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fd736e320a91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_6007c56716690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wuniku/61850495012.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/why_isnt_my_scanner_scanning_the_whole_page.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/48771117041.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/breakfast_around_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/porixegilow.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/fnaf_1_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/jakufu.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/vuwufikafiwobodepoxem.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/poker_cheat_sheet_black_rain.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/57618891556.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 5328 bytes
SHA-256: 9203128816a790ae107a3245c198906939b94dc0a0ad35ba2cda26f77e600008
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10272 bytes
SHA-256: 4d21a10a8abbc501954250b433fa1c2355a8a62430d89d94716cdd1ee40e8d03
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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