Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef717229a824e93…

MALICIOUS

PDF

134.7 KB Created: 2020-11-19 07:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 78228a401479a832bb79e51c6fa7038b SHA-1: b9021398870f87ae8663e55531ecc18ca2c6b7a2 SHA-256: 4ef717229a824e93a160c333075356e8c1232d72a993229e75931e67896d3712
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, including a link farm detected by heuristics, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/aws?utm_term=best+korean+facial+sheet+mask PDF link annotation
    • https://vovaderinikuxu.weebly.com/uploads/1/3/4/5/134528816/9125902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5f9f16452f408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f92f95d00ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_5fb3d979e39fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8f259f96106.pdfIn PDF document text
    • https://jepusujejo.weebly.com/uploads/1/3/4/5/134598091/fodexotag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8b5d833a3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5f8fb7a6dce80.pdfIn PDF document text
    • https://miragitoketulo.weebly.com/uploads/1/3/3/9/133997248/a4dedfbbd175b.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/voxasonapazupege.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/a7805204-0811-4a7a-bcfc-f1b0cc1fa7f9/sikowofenaxufidowizoguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01aa59f-83df-4c6a-aa93-ecffa8ac43ea/furibamonesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d91d94a-1af0-4f97-8501-96c347126c74/58608490723.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/words_that_start_with_ruh.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/gamazifebibekinolodavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ec1755-e3a7-4162-a937-c14f6f4b1550/interstellar_full_movie_download_in_hindi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3A4 5232 bytes
SHA-256: b10cb6e6f0e4732e43b0dc2a6eca203d0a037f704cb0e3df6ce0eaa97a174dc9
font_01_sfnt_off0001e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E550 11900 bytes
SHA-256: 84487e7ee75cdde08560c445bbe4f309e9a90c68a51b0d97ed268f84bcf395e1

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