Malicious PDF — malware analysis report

Static analysis result for SHA-256 c131190facb1d44d…

MALICIOUS

PDF

74.0 KB Created: 2021-03-28 08:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6913d2b1618446f985feed4ec95b4d6 SHA-1: c9ac7f978fbc2bc716a3af7f639748ca1d7568d6 SHA-256: c131190facb1d44de94d08341100e5991cd1f0d40510f80e7b9937d1e91b20cd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to reference 'study planner template pinterest', suggesting a social engineering lure to drive traffic to the malicious URL.

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://kuzutuzo.ru/123?utm_term=study+planner+template+pinterest PDF link annotation
    • http://madoxorijegobe.sportsontheweb.net/jonathan_livingston_seagull_book_online_free.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/94577573283.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/bajaj_ceiling_fan_price_list_2020.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/lopuro.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/bwv_998_prelude.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/stanley_wet_dry_vac_3_gallon_review.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/lepefi/bogixuvaxedezif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4fb98c-b124-44b9-95e7-9cc4facfa233/gaponalejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e47cd3-01ea-4918-a9ee-323d74c24143/the_crucible_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/avp_1_full_movie.pdfIn PDF document text
    • http://tubujaj.epizy.com/pu_songling_strange_tales_from_a_chinese_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/score_sheet.pdfIn PDF document text
    • http://vatilibudavelit.rf.gd/android_api_level_26_changes.pdfIn PDF document text
    • http://dafuwinev.myartsonline.com/neurological_examination_made_easy_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/85781004974.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/what_is_my_zip_code_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/27662530125.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/rekurubesoteja.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/maniac_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/65542113443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f5dbee-e1f6-4ae3-ba3e-9cf27f99d326/how_to_charge_a_flip_video_camera.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_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5312 bytes
SHA-256: 5803f21b5b384d0a25cb4090596e198c87fd8b81200e80ee88fccd494dae9add
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 10648 bytes
SHA-256: b7cf975387e476be189bc8f46cf1feeb9b42a020b3e2e91ac7aaf8d299a319c2

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