Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1b8f2a40e57a74…

MALICIOUS

PDF

67.5 KB Created: 2020-12-15 11:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3e2ee9e685621e85054b34efd4f5d682 SHA-1: 9ab7c9eba1ce9fb09f90cf35d66202b366645aa5 SHA-256: 8a1b8f2a40e57a7491fbcec98d28840735e240000db4fa52c3d5273d6ca572e0
154 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 routes users through malicious redirector infrastructure. 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
  • 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://traffmen.ru/strik?utm_term=grudge+ball+apk In PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/vamatawirosumax_dedizolovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5faa48a30ebb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5fd07284f2e5f.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/xijaxumir-benifoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5fbe980e48d88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca60231-57b0-4d62-b2e1-904b4e431152/40294343344.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae5e1c8c7413143d62f6/t/5fc80fc375dffe5f6f669a0b/1606946756038/10989098837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd0d396-8fa7-42af-9334-84b2de86ccf1/26486789826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abab004-706b-4d8e-9a59-4815f21eecf7/26586932996.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc284b73570fb44d154931e/1606583489367/69987635083.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72a5c9849b27a00a4f8bb/t/5fd6ab21ab1a676c7299e037/1607904034435/aguila_dorada_bis_sa_formosa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc592a72e34347c706420e1/t/5fcd2658f94b6402b2228b14/1607280217645/skyland_resort_cabins_shenandoah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56396a62-5adc-4e20-9762-e816fff7e69a/dnde_para_encontrar_hierba_de_bison.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_off0000ca86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 5184 bytes
SHA-256: 56ec0a13e25dc8665a92659422a2f2d35e6656b362efa3d72c6dc45d79ca79e5
font_01_sfnt_off0000dc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 11036 bytes
SHA-256: dfb165fb6196b678c845b9a391f25ae31edf72c73517d0b451b7e4532478f5e2

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