Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2911117341a36a…

MALICIOUS

PDF

86.5 KB Created: 2021-03-28 09:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 91ff65eda5370b58f4c9c8d0d3fd14c6 SHA-1: 906bc40025ce99a13755a14a492cd7599b49129e SHA-256: 4a2911117341a36a26310e50c2184f85b53bb156f724fcb9ac121d8fd15e351b
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=circular+motion+worksheet+3+answers'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body, though heavily obfuscated, suggests a lure related to 'circular motion worksheet 3 answers', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=circular+motion+worksheet+3+answers In PDF document text
    • http://larijasetejupaz.mypressonline.com/ciudades_y_capitales_del_mundo.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/shogun_2_christianity_benefits.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/gukudoviwa.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/godewumazek/4088292758.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/how_to_reset_john_deere_service_reminder.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/bazaar_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/profit_and_loss_template_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/10032934835.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/age_of_banded_iron_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21adfda-876a-42db-a934-d9356f33b694/interior_decorator_salary_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/61341744649.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/liredukarekoxefivezezu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/konopugifonerinawidopobor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a13b29-7cc7-49d5-9029-0e4348937af9/33391629815.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/advantages_and_disadvantages_of_online_education.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/30771430849.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/la_fuerza_de_sheccid_resumen_capitulo_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/rifivevulonudeteroli.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/witofukeru.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/how_to_use_the_sodastream_spirit.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/kendo_ui_dropdownlist_mvvm_template.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_off000114a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 5264 bytes
SHA-256: 9001c19c83bfe8506ee07a4b83b5fdb95191395aebe7d22277c4ec38e6d12b17
font_01_sfnt_off0001266b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266B 11224 bytes
SHA-256: 417f5e5fb35457ad39fc45aed41ed1050ffd3965b70f4d6173caf115afb9a899

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