Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd4f2b520b89651…

MALICIOUS

PDF

80.8 KB Created: 2021-03-18 15:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a461585f1cbdf93d89eb37a7f3dcffae SHA-1: d0bc34f47669bec30e2f0684df7a57ac28733de0 SHA-256: acd4f2b520b89651c4b2171ba03097d391a2732383a3cba1f608b70ee301d063
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing or malware distribution, disguised as a tutorial. No scripts were extracted, but the PDF structure itself contains the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=blender+basics+tutorial+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5ff14828819fb.pdfIn PDF document text
    • http://fertpin.online/proloy_bengali_movie_full_hducpyt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fcdc0c8d938d.pdfIn PDF document text
    • https://televonifu.weebly.com/uploads/1/3/0/9/130969274/855ac.pdfIn PDF document text
    • https://pifonexivusefeg.weebly.com/uploads/1/3/1/0/131070190/2950d90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_600c92b999ffb.pdfIn PDF document text
    • http://de-bewertung-889562.icu/macro-trends_affecting_the_future_of_the_us_healthcare_systemxlbj0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_603b57d34f0f3.pdfIn PDF document text
    • http://blablablacar.online/will_there_be_another_how_to_train_your_dragon_netflix_seriesuod6b.pdfIn PDF document text
    • http://winoraama.space/2007_dodge_caliber_sxt_repair_manual45idm.pdfIn PDF document text
    • http://veronaital.space/un_chicle_sin_saborxlrhx.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/5549658.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/sifawekujiki/yahoo_mail_free_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab017cbf-5133-4d82-be3f-729246785f32/32305195841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8717aea8-5b2b-451a-872a-40f48900b50c/bonibu.pdfIn PDF document text
    • http://kupuwatuz.epizy.com/batman_arkham_origins_riddler_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/48924641868.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/close_to_you_maxi_priest_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a9ad5c-714a-42a5-97ee-dcd087006df3/century_fc_90_welder_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/lamokomugawabimidox.pdfIn PDF document text
    • http://dunoziboxisi.epizy.com/after_you_ve_gone_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/baixar_netflix_4._8_5_apk.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_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 5336 bytes
SHA-256: b47ea364d36b0c10e9fab4ce65401a52ff3b1bfb68ab565138caa640a59c5b56
font_01_sfnt_off00010f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F07 10816 bytes
SHA-256: 27ef846c318c2ad6ed882a1b0032d8a7aee060cb8e8fb1df42bb06e6f9c1189b

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