Malicious PDF — malware analysis report

Static analysis result for SHA-256 7157d145bdb25c92…

MALICIOUS

PDF

82.4 KB Created: 2021-04-13 15:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c31767628cb693762f5fa43c946c5d SHA-1: a48d28665b8683e43bd7844f1a0f2f872b9a84ce SHA-256: 7157d145bdb25c9256f9e6e8a0cbaead13550f32d155c9204042a16b6bf6a732
96 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a site related to 'logo quiz guess the brand answers'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the presence of numerous suspicious URLs suggests the document is designed to redirect users to malicious sites.

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://seumenha.ru/strik?utm_term=logo+quiz+guess+the+brand+answers+level+3
    • http://copyrightsupportforlnstagram.com/793560356871mwcs.pdf
    • http://notdull-eng.online/817469835255kigq.pdf
    • http://natosabi.mygamesonline.org/woronujaziradaduberufo.pdf
    • http://vipmanmarket.space/is_chrome_a_security_riskh4bcc.pdf
    • http://m-laskin.ru/29767524661v6bxs.pdf
    • http://remont-kholodilnikov.website/what_is_the_best_heart_rate_monitor_for_pelotonz3nar.pdf
    • http://rusherx.studio/pesabexuxigepakitizkfh.pdf
    • http://repair-monokoles.ru/tejeduposolomurepiyfqdm.pdf
    • http://rivafigikiwax.medianewsonline.com/21_cfr_part_11_fda.pdf
    • http://detonic-deutschland.website/kamakura_shirts_fit_guidepmkvh.pdf
    • http://xijulefabogi.getenjoyment.net/troy_bilt_tb225_carburetor_adjustment.pdf
    • http://xsale.trade/14554439275l569v.pdf
    • http://olipaka.xyz/77031485018ci2n6.pdf
    • http://ritibaj.22web.org/flipkart_games_carnival_answers_21_may.pdf
    • http://ig-socialmedia.xyz/15769070409se2lo.pdf
    • http://iranomics.com/endless_run_magic_stone_2_mod_apk6c8hv.pdf
    • http://zenajok.medianewsonline.com/48207533773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_0752d6b623294ad68fb1f0a9902ee49c.pdf?index=true
    • http://dowisekek.rf.gd/mowakezuzejaviwop.pdf
    • http://woxesizefibugel.atwebpages.com/xogawitoxaxonibegesu.pdf
    • http://vutelubuvobu.rf.gd/xegafolux.pdf
    • http://xajumin.epizy.com/goniwa.pdf
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_b57cfa8ed98945eca1b978f9dce500f6.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edde.bin
68c37517ccead5b7bd63d12505dd2d0a3864419de199904aadcd775e85452c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 5660 bytes
font_01_sfnt_off0001013c.bin
3de341c290195da61d902435500e92480070dd223fc6b8544469418caeb3c88c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 10884 bytes
font_02_sfnt_off0001266f.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1266F 16164 bytes

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