Malicious PDF — malware analysis report

Static analysis result for SHA-256 859473a414d8f99b…

MALICIOUS

PDF

91.2 KB Created: 2021-02-26 02:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b963aafd2fb64f725fa0a81bff92bc4f SHA-1: 943e6b75f5d4a005914e7a8efdae357252fdda33 SHA-256: 859473a414d8f99b294b1fa033162766c0c68f0e50fd6bd11b0bdfed82bf08eb
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 suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, suggests a lure related to rewards or information, consistent with phishing tactics. No scripts were extracted, but the presence of multiple suspicious URLs indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=which+three+are+key+components+of+an+entity+relationship+model PDF link annotation
    • http://ig-verifiedsbadge.com/gerazogebizafadivelerehad.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/how_to_hand_score_the_basc-2.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/b64cc2aa.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/a133c5ddd.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/elements_of_musical_theatre.pdfIn PDF document text
    • http://starconflict-game.ru/28925248863k2ngb.pdfIn PDF document text
    • http://yoptan.space/fojubemafidokogemok8vt14.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/ninazarila/android_studio_sdk_manager_not_opening.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/95457002366.pdfIn PDF document text
    • http://zujopafupo.epizy.com/english_grammar_app_for_android_free.pdfIn PDF document text
    • http://ravuxigud.epizy.com/gaming_pc_building_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/gexag.pdfIn PDF document text
    • http://sajutab.rf.gd/graphing_proportional_relationships_worksheet_answer_key.pdfIn PDF document text
    • http://gezibetaw.epizy.com/4816671096.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/78421571310.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/likikapevuragiwiwimoxi.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_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 5576 bytes
SHA-256: ac25f75042ffbd548ef36a20db31afc32e278706caccff42d5a9e5c4b9176820
font_01_sfnt_off00013bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD4 10288 bytes
SHA-256: 6591d03e9dba904109ddaac6f8152a399cad0a83c040bf2f9d737f384d3fe46f

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