Malicious PDF — malware analysis report

Static analysis result for SHA-256 60eb1f7915442c8a…

MALICIOUS

PDF

72.8 KB Created: 2020-12-26 02:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 026a27b6309a6659a515aaa4952d099c SHA-1: 567d3d9009ad7b70b5178dce641d8c3a3161b122 SHA-256: 60eb1f7915442c8a643a6d6a954ec434abe16d11a2b044d09204b2f7d462fc35
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malware or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ggtraff.ru/wb?keyword=unknown%20fate%20apk%20obb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5fba16fee5196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_5fde87e5bc96b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5fce95c92c759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f9366303e815.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/kosavidoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5fda6f847480a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5fd2a7c4a5802.pdfIn PDF document text
    • https://jufozovujibozom.weebly.com/uploads/1/3/4/3/134360308/nijujenozogu.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/3d9eb2ad-7ca0-4693-8e94-b6b935468535/venice_beach_movie_theater.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/remusigesowezoremifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302cdb83-8b0b-42e9-9cd7-ff0286f4559f/lodanogivuxiwabejikodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36dcfaa-c95a-41e8-b3ac-51f22e08ce00/bupiboja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1592c637-4f7a-4166-b29a-5abd68b8d281/nhc_nn_c_th_em_yu_nh_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57c257b-44c6-41d5-9f05-dbc1bba3432c/dovuj.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_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 4876 bytes
SHA-256: c5428c7a59d2be892c68e272ebeddf6a6cc6d1d560977544e8b01723625d7cad
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 11724 bytes
SHA-256: ab1f12b411711ae0d50d378b02af77cae62d3a3c5c4770a23374968f62feb38b

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