Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7c99128dc342d7…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 05:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acff9dba2b5407dcd6e6f8d5b5e7e03a SHA-1: d416b232256ff3b7646854f9fa75777cf77b84a8 SHA-256: ae7c99128dc342d766c73b1638e221586adac8339f75a6348d86f40da23abc3c
104 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that is likely part of a phishing or malware distribution scheme, leveraging an invoice lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=how+to+pay+dish+bill+on+tv
    • http://gubixazolela.sportsontheweb.net/analytical_chemistry_notes_download.pdf
    • https://static.s123-cdn-static.com/uploads/4403534/normal_5fcd30e2c66e8.pdf
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ff9a422b7b69.pdf
    • http://fozivot.mypressonline.com/45466302482.pdf
    • http://gufutaca3.xyz/tavefeweyffoo.pdf
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/wejaxum.pdf
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/2792699.pdf
    • https://cdn-cms.f-static.net/uploads/4406775/normal_601055c8059eb.pdf
    • http://texifudosino.mygamesonline.org/ca_cpt_2020_books_free_download.pdf
    • http://vadosixajobirug.mygamesonline.org/biblia_catolica_dios_habla_hoy.pdf
    • https://cdn-cms.f-static.net/uploads/4480423/normal_601c605eddac2.pdf
    • http://ch-redirect.icu/aortic_pulse_pressure_equation3t6um.pdf
    • http://fakaripeti.xyz/90986571364yskar.pdf
    • http://suvolupijiro.mygamesonline.org/charlie_puth_attention_piano.pdf
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fe66e4f32602.pdf
    • http://gazupoz.sportsontheweb.net/canada_pension_plan_retirement_application.pdf
    • https://jasefukop.weebly.com/uploads/1/3/0/7/130776564/575731.pdf
    • https://cdn-cms.f-static.net/uploads/4426972/normal_60449699b3003.pdf
    • https://cdn-cms.f-static.net/uploads/4479684/normal_60343a078ba8b.pdf
    • http://jorowijedo.mywebcommunity.org/40612532748.pdf
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5fefa7283185c.pdf
    • https://fopalese.weebly.com/uploads/1/3/5/3/135349797/xatatajak-gapasereraxexul-kudodit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://forezepolutaju.onlinewebshop.net/3564108005.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6d.bin
c0fd4e97de1d8f0578327143e45dbf15d449f8e88428b969d801ad122ddc4949		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 4976 bytes
font_01_sfnt_off00010b56.bin
73484bfe3bbe8d2d7565b962b1dee761880db51c603c60e081cca99c8e5cc05b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 10576 bytes
font_02_sfnt_off00012f8a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8A 4324 bytes

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