Malicious PDF — malware analysis report

Static analysis result for SHA-256 612f0ed22a4718a1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 03:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8e12ea6196d03de63bec30c473474cfa SHA-1: 8ebf5646246205bce9bc3a5fa7bfb5b51d92a30c SHA-256: 612f0ed22a4718a17465449ee7e0997966b16a8b5756d9986ab665226b94d23a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a search result for 'hudson public schools wi', suggesting a social engineering lure. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=hudson+public+schools+wi PDF link annotation
    • https://cdn.sqhk.co/fopajuxalaso/ic71ujh/super_boy_adventure_jungle_island.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/deerhhe/82805439163.pdfIn PDF document text
    • http://keto-menu.online/carnegie_learning_online_answers287m5.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/cYjfjhq/99568311209.pdfIn PDF document text
    • http://senoratikazunub.22web.org/bodybuilding_exercises_guide.pdfIn PDF document text
    • http://momentshop.space/ejercicios_de_derivadas_trigonometricas_inversas_resueltose0vql.pdfIn PDF document text
    • https://cdn.sqhk.co/puviponapib/fGhbvhd/album_akmu_sailing_k2nblog.pdfIn PDF document text
    • http://pro-gram.pro/49265044761wp5vx.pdfIn PDF document text
    • http://fibawejifuma.22web.org/65228604739.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/zuponefi/673903638.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/california_math_mcgraw_hill_grade_6_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/pagilirubupalikabub.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/free_painting_quote_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5043f7-1da9-400d-9ea8-f0e0916ccfd2/lopiwakusekimuxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb40f47-e02e-4f44-a482-cf0ce04f50db/potelitoxute.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/ronuxatizejar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8fed38-22fd-4a30-a581-ff884c85039b/bokanediwagedabemiduganur.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/what_is_profane_in_sociology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab9aef9-e428-4335-a4bf-c8054f09f326/how_to_edit_a_drop_down_list_in_word_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/30364087317.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/85125139105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aba85f3-6069-48da-a32b-09751a65fb26/wejuwadi.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/block_all_ads_on_android_phone.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_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 5048 bytes
SHA-256: 877181b372bed0ff2c3f48e34cfa503e233944eba0c91e2d83a8745df992c604
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 12120 bytes
SHA-256: fc37a7b3491194faa44825607b28d7d2dcc4b51c0fd5081c79dc43734db6174d

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