Malicious PDF — malware analysis report

Static analysis result for SHA-256 78de43bb793f63c7…

MALICIOUS

PDF

70.7 KB Created: 2021-01-24 18:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aec63c5ef3e573956f6599299a941e30 SHA-1: ee360d9eda0f862448a76c57df598354f051b575 SHA-256: 78de43bb793f63c7cf85f78b410a234931fd2182ca4d1e6a9ad0a583a9e90bbf
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used to host a phishing page or download a second-stage payload. The document body, though heavily obfuscated, contains text related to 'Lol surprise confetti pop wave 2', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=lol+surprise+confetti+pop+wave+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5ff5436b82c40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fd05ff17af0e.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/eoWgiii/96977975543.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/icmMjjP/21013907116.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/jjMtgiY/granny_square_pattern_generator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_6001221b61d4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447888/normal_5fe1572aa6f4a.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/Jjd6Agh/49614698018.pdfIn PDF document text
    • https://cdn.sqhk.co/jexerigix/ibhcgjg/super_worldbox_next_update.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/ztcHhhh/ritaderodowuremusori.pdfIn PDF document text
    • http://tovelksa.website/rugby_ball_on_rope_game1g77n.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/5igihjb/no_dice_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/e0Krjjf/ronedetopumomomalavef.pdfIn PDF document text
    • http://sokolov.fun/guilty_crown_episode_1_explainedi65uk.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/onedrive_fotograf_paylasmaeio3y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadedosi/akele_hum_akele_tum_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/74679662836.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/dijejovez.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_off0000ccb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 5236 bytes
SHA-256: 27cea4a7f14962d3d78f1d2102cd5afbf0c9d570d0659799a2a163d8c3b97ac7
font_01_sfnt_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 14360 bytes
SHA-256: d13a7b0e40bfe73734e2857f6c3c14a0e7ea4b5685a7dc28cd4e27dea4b90ae2

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