Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5aaace36de6328a…

MALICIOUS

PDF

73.9 KB Created: 2020-11-19 00:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 803a8579622df58e327815322676434e SHA-1: cf5f0f43ee72e147eefd76cbafd75a78a032f910 SHA-256: f5aaace36de6328aae96cca736227d451931cb46f79c9d4c5b490ca4942297a3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://traffnew.ru/123?utm_term=san+juan+de+la+cruz+lemon+grove PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5fa2cb3c5543b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f953aebead49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f9056223ea90.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/fifomi/toastmasters_table_topics_questions_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd032d9d-d4c1-4fc7-8ea6-e8274cc3c83d/graveyard_keeper_mrantifun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b7661c-042e-46b8-a7df-84b88aae3008/zozububijujibab.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/escape_from_detention_game_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/flip_words_answers_list.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/anorexia_y_bulimia_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/bose_700_soundbar_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d53c890-e835-4d66-9ee7-e53968a39044/84840608647.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/balada_de_amor_ao_vento_baixar.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_off0000e366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE366 5372 bytes
SHA-256: b0f630b336f477642115688cc0ea1aeec99a93ed28860f4e9e50cade24ddebbc
font_01_sfnt_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 11216 bytes
SHA-256: edbc4d45d454eedc28edf3abf1502694a58d21975725e08427beb9a152ea46a3