Malicious PDF — malware analysis report

Static analysis result for SHA-256 35733658d5d4d94d…

MALICIOUS

PDF

69.8 KB Created: 2021-02-22 19:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ab0100a1e345b863c547ecd746aefa9b SHA-1: 2a4807ced8e7298541b7cd28e95fa7e2a2e1429d SHA-256: 35733658d5d4d94d10e9128a06a47e83d2d7d24aeabc0092bf3bb608fef85514
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/strik?utm_term=sas+interview+questions+answers+clinical+trials', which is presented in a way that mimics search engine results to trick users into clicking it. No scripts were extracted, but the presence of the malicious URL and the overall detection strongly suggest a phishing 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://maypoin.ru/strik?utm_term=sas+interview+questions+answers+clinical+trials PDF link annotation
    • https://cdn.sqhk.co/sawomunuj/hjigcgi/download_power_rangers_all_stars_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/gNDihib/40640689865.pdfIn PDF document text
    • http://lujuvudav.22web.org/vewilema.pdfIn PDF document text
    • http://fegebekuxew.22web.org/agama_buddha.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubapapi.epizy.com/god_among_us_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/branding_mockup_free_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/28242668656.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/vujade.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/arvo_part_tabula_rasa_sheet_music.pdfIn PDF document text
    • http://bunisanabasa.epizy.com/soundcloud_premium_apk_2019.pdfIn PDF document text
    • http://jegepifewomu.epizy.com/70588176575.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/birthday_celebration_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/bisleri_new_ad.pdfIn PDF document text
    • http://pafapijeneradab.rf.gd/40145132346.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/backseat_ari_lennox.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80E 5176 bytes
SHA-256: 35526adee7df8c5b50f239a1c47b4925478016f69b2dee38e07ec1bfee33d902
font_01_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 9440 bytes
SHA-256: f4c202cf61a15ecd4a780d6c7ce103a3b981c97fa7b2b3e77c702a5ec0977c77