Malicious PDF — malware analysis report

Static analysis result for SHA-256 915634ef723bfbbb…

MALICIOUS

PDF

79.6 KB Created: 2021-01-25 01:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 70917268632a2100bf022c3cc5f4590d SHA-1: 2dff6c2aa91358c59a0013f26e2a06c533abc46f SHA-256: 915634ef723bfbbb51d168cf1b5ff9c1518f65f1de6445d1be9263d552088afc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 document body contains text related to 'Final Fantasy armor' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious URL. The presence of embedded URLs, specifically 'https://traffset.ru/123?utm_term=final+fantasy+armor', further supports the 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://traffset.ru/123?utm_term=final+fantasy+armor PDF link annotation
    • http://muldwych.com/ixl_learningsearch_topics_and_skills_username_password_remember3klp3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fcd34122f99f.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/early_neonatal_sepsis_guideline_aap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_5fd790e93c24c.pdfIn PDF document text
    • http://testersairf.xyz/baxuwaduroxegemen5h54h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485698/normal_6005130327179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474478/normal_5feaf27febf70.pdfIn PDF document text
    • http://lady-bug.club/xokejebezivagasole8rapb.pdfIn PDF document text
    • http://fb-ig-violation.com/lime_your_ride_anytime_pricebbomh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5ff1c4f321258.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5ff3556c8169c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_5fe69e6b92e79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gewofudi.rf.gd/xomelapezotasopaxolipemoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/scary_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/musica_gratis_da_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/bhojpuri_gana_video_ing_dj_par.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/hcad_protest_forms.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_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 3956 bytes
SHA-256: 6e091b071b0df2d25c85192b3662a6bcbac0af16bd3364250835245b7da77699
font_01_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 4968 bytes
SHA-256: 5f79edd38a8229cc1d99cd4bf382f8f63f901ccf860903154863b390c3d2ee59
font_02_sfnt_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 11140 bytes
SHA-256: f570f193c2d08d1dc65292d6990a140aaed0e48610025afe73dfdf78261463a9

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