Malicious PDF — malware analysis report

Static analysis result for SHA-256 83362007f1bcaece…

MALICIOUS

PDF

95.5 KB Created: 2020-12-20 03:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53a09115b4fe0bab8f280a0206a3a499 SHA-1: b564cc1ff724074d65b191e40d4a7843e21266a6 SHA-256: 83362007f1bcaece0fbea27ba76e65fa021714ee7d790e908b529a5fefa6896b
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=cloze+test+worksheets+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5fbf0ff3bcde7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5fd37d4e2b6a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fac1a3c45138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fc64863bb1f1.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/seriposuj/piwejix.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/logo_animation_after_effects_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a1bf63-5a25-4025-9746-f534cec3ddbc/befotuwojaxetikaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0884a324-a9c6-4e09-844b-2155b7cf050c/typewriter_sound_effect_imovie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7bc2425c6404843c03bf/t/5fde9453892c8943b0b12881/1608422484741/toastmasters_table_topics_evaluation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/20288888027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e5347f-8849-4e6e-8f52-73092590f5ee/keurig_2.0_temperature_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/vivoxilexalujameg.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/entrepreneurial_mindset_ppt.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_off00013afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFB 5240 bytes
SHA-256: a8e1603625ad8488faeece57df62544a7cd336f34de418f12bba46550979e953
font_01_sfnt_off00014cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDC 10528 bytes
SHA-256: 0ea3b8146450486b84ce2996a39f037b67cf9563e9022a722bb70829de74855b