Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c0b5e222958904…

MALICIOUS

PDF

67.8 KB Created: 2020-11-17 00:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 71278b9ffd45c78d7868f0201fcff68a SHA-1: d0dced94c2481be8c7ee77adfbcbada60a593188 SHA-256: f4c0b5e222958904592cde11b0b62ec2c4e130f4cec5745e5e4b30196c4635d6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=bimmercode+unlock+coding+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f9807fc7df07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f926f4163167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f9480e363ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fa5b4bd0219c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f9b67365cb25.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/pusixa/fundamentals_of_molecular_spectroscopy_banwell_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6173bc-99ae-4dc1-87ed-9e8f3cd99dec/57354474572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02441fb1-22e9-4ad8-8d88-8478ede6f0d6/minions_2015_movie_720p_hd_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f4afd9-8e0e-4ef1-b612-b50aaf9e0d0f/arpeggio_sampletank_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9cbad2-c551-480f-b242-ccf0c797e4b6/gym_candy_book_essay_recommendation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d137c34-58f6-440a-9eb7-fa57dcf78487/lugatila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff32882f-67f9-48fb-a938-83bd059bd6d1/zelda_ocarina_of_time_rom_3ds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f6f485-ce82-47c6-8ec0-5093e7f9e119/duwim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3033b980-89b9-4aac-8840-f0805cc3490e/nupalon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993e8c46-82af-4ea3-8522-762746b26307/biomes_o_plenty_mod_pe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c1fb5d-3169-4577-be67-79e2198881b4/dezosedogik.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_off0000cb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1B 5328 bytes
SHA-256: 3b09a933e9cfbedfb8c4644ebcf183e7d266306c845dafe1b5d2cfbe9973f13f
font_01_sfnt_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 10948 bytes
SHA-256: f34c20ef12d7aaf0a60ca0d86d0b0fa9efeda134e0f47122cee8fb110d9e9fdc

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