Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ceaab7c43c78bfa…

MALICIOUS

PDF

87.2 KB Created: 2020-12-05 23:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ee12cfef82a5c513b21c4ad9d47f1d8d SHA-1: 1e4412021d45c982fe22240fa02adece1a2026bc SHA-256: 8ceaab7c43c78bfade60778d03471d8ffd1645e070d9f941058e3c73d87884d6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is weaponized to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=tai+lopez+book+app In PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/05d8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f8f8fcdb6269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_5fb4b3c536ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fb2b819a0b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_5fabb04551aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5fb9f245c788c.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/9c852a3a750.pdfIn PDF document text
    • https://tilifezazam.weebly.com/uploads/1/3/4/7/134763305/5418059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f91ffa68177f.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/vonoxavofub.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/68a387bd-def9-48dd-ab2f-06d9294f67c5/alabama_dmv_cdl_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9009e03-3cf2-44af-afbb-43197b11be43/gozopizu.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/55364296331.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/movie_apk_mod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 4744 bytes
SHA-256: 07984090328d0bbb94a51509010e313b8496f84123686c2d49226fc87264e5a2
font_01_sfnt_off00011a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 4020 bytes
SHA-256: b99d03cd4d7f5f09879ba70cb9847035fe609e75857350f1522a17aa2ada233b
font_02_sfnt_off000129c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C1 11292 bytes
SHA-256: 4aa8bfc0dbd40c0c3c58aa4ae5bc5eaebcb1f086b5bb402a1ff62c8ebb56e85c

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