Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68dcc893ce85ac4…

MALICIOUS

PDF

319.0 KB Created: 2021-04-08 05:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8c43b25f7bdbc173ba6e4698a110fe38 SHA-1: 1dee7ddff0be4d2bca57b865df9644a386db73ad SHA-256: d68dcc893ce85ac4c69bab088265b135bfcb3fa31007f062c63c275c7385b429
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 for educational content, likely to trick users into downloading a malicious payload. ClamAV and ML classifiers confirm its malicious nature, and the presence of embedded URLs suggests it is designed to redirect users to further malicious content or downloads. No scripts were extracted, but the PDF structure itself is flagged as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9793

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://kuzutuzo.ru/wix?keyword=biology+chapter+15+evolution+test+answer+key PDF link annotation
    • https://cdn.sqhk.co/kawonidoza/ibhfIyH/bass_boosted_car_music_mix_2019_descargar.pdfIn PDF document text
    • http://shoop-fh.ru/fopejizefigejugkojik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_604cb3b9acb4f.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/iduzgh7/greatest_hits_radio_fm_frequency_liverpool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_605bad6582484.pdfIn PDF document text
    • http://ipatovaalena.ru/3991605379qnsuo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_6038d2de7d53a.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/biaS2ib/battle_angel_alita_last_order_deluxe.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/GhaZjga/7550263452.pdfIn PDF document text
    • http://labanom.22web.org/true_muscle_workout_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_6049d8b47d10b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_602cd84d23ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_60146c02e4892.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/MtgjQhj/fefaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5fe8eefc27051.pdfIn PDF document text
    • http://useplafond.xyz/nonavojedegabetugakiduq4yh4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://senisiluni.rf.gd/al_quran_with_bangla_translation.pdfIn PDF document text
    • http://jexiwowope.rf.gd/chick_fil_a_jobs_for_14_year_olds_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/blockbuster_bollywood_movies_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/81809855750.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0004ca40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA40 20228 bytes
SHA-256: d7b1a86310e516f72818d2eb3c7da198f1e167ddc65eb101358cddd6eb2e3739
font_00_sfnt_off00048633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48633 5740 bytes
SHA-256: 7feef2b45ec7d88254a989bbd92735af1259b015a3c43c66ae9f9ed2d7223ab4
font_01_sfnt_off000499e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x499E2 15724 bytes
SHA-256: fee65777258a4cce083f5d2a9beaa089deea31651fd25068b30c376085cab83d

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