Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b36e20ac23b3b7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-07 15:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dc41492594eaed13d9fd4e64667b1d51 SHA-1: f4c669599363d50445668fe68eb2a762174a687a SHA-256: 64b36e20ac23b3b73682958ba0873d7bcb61adf9ce6ff8a47a2968c166c5895d
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a known malicious redirector, which is a strong indicator of phishing or malware delivery. The ML classifier and ClamAV detection further support its malicious nature. Although the document body is heavily obfuscated, the presence of the malicious URL suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=black+and+decker+bdcdc18+18v+cordless+jigsaw+kit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_6010f92b7bb59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_5fd1718d9c12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fe6dea7c919f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_5fd0f379019d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_60136c4da0912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5fdafdb4e8cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_5fda52dec796d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_600c03c92b474.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/mogedozara/are_mackie_thump_speakers_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/futifesosesus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d3a0f9-6049-4866-8cc5-e0885764a825/roxefogowivoxewakenoruxor.pdfIn PDF document text
    • http://fikirifulok.epizy.com/hp_stream_laptop_pc_11-y010nr._specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13427252-ee8b-43bb-bd62-6f5731090359/64297209722.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/drug_allergy_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab079d7a-2077-49eb-83a0-eec6eee3ae49/pallet_truck_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f382b1a-c7a4-4553-a145-a605cf40d9d2/united_states_army_field_manuals.pdfIn PDF document text
    • http://naxixexofeveto.epizy.com/seben.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/64943236246.pdfIn PDF document text
    • http://zisoramemib.rf.gd/academic_reading_test_3_caves_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/75731681195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caae75f7-d44c-4114-b22b-aa27d8390903/pajitagavojupo.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/99170100382.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_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 5836 bytes
SHA-256: df4d027d6ba8a8946a1c317e2c6a582aba658d6250f1caee88e498bf0e039acc
font_01_sfnt_off0000f819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF819 11444 bytes
SHA-256: d119d4b117fd83824ec6e2574870fb508cc7b8617796720454ddea42b8d54e02

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