Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7c6fdcc58e659d…

MALICIOUS

PDF

76.7 KB Created: 2021-02-11 17:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 77780baf8f74a051a782a1bfc62235c6 SHA-1: 947f575e94e9b32f4e0898fef41f82f76c51be4a SHA-256: 0c7c6fdcc58e659d964d1a6f6c6413983e8fc17b405d11c02176279261fbc5c0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier further indicate malicious intent. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=coot+decoys+in+spread In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454811/normal_6010b3a74e8f7.pdfIn PDF document text
    • http://bullbananavannaone.xyz/principles_of_ecology_study_guide_answers2fqim.pdfIn PDF document text
    • https://padaduzarunum.weebly.com/uploads/1/3/1/1/131164270/2995276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_6011e2b21bfc4.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/6c6b271575f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451049/normal_5fcc14e47ebd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5ffbd9715e85d.pdfIn PDF document text
    • https://jaluburevajag.weebly.com/uploads/1/3/0/8/130874017/4979219.pdfIn PDF document text
    • http://megahit.space/chasseurs_alpins_uniformpzlrp.pdfIn PDF document text
    • http://uanews.website/bloomery_active_volume_pedal_manualbbi80.pdfIn PDF document text
    • http://originalhallyu.com/rafumefatasoxizavazclz17.pdfIn PDF document text
    • http://bt-management.website/fibakaxififods7os.pdfIn PDF document text
    • http://mini-camera-super.club/data_recovery_quest_destiny_2mrz4b.pdfIn PDF document text
    • http://1cats.space/lego_ninjago_minecraft_texture_pack_1.8p0ako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5ff05dbec8a12.pdfIn PDF document text
    • http://baranaydin.org/kanye_west_late_mp3_download9axam.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/zetituri/chevrolet_spark_2010_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/instagram_insights_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/ccmaker_file_failed.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/wirutavojefexilumaduduxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/fusiform_muscle_fibre_arrangement.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/rofebufezefixupe.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/44836153338.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/conjunctions_worksheets_with_answer_key.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_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 5044 bytes
SHA-256: c909b55a0e02af20b523b24735efeaa5df58821a5a34d40951d915e54d3e7336
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 10404 bytes
SHA-256: 07ebaf08a68b42cc91e17f427dc7b9a80cb014895524b40bfa71163cbdb7011d

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