Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6613111c517c64…

MALICIOUS

PDF

68.8 KB Created: 2021-02-21 08:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 16ad822dd8de3e8d674e1e104fa19f85 SHA-1: 2d8147351e370f8c30458d01d259e6bb9de0f79f SHA-256: 9f6613111c517c64218f5eea5c263fcd81151568b9625a10002989fbf64b964f
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/wix?keyword=rakdos+aggro+2020 PDF link annotation
    • https://peketodofow.weebly.com/uploads/1/3/4/5/134589962/fb467b73dd.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/porijibejemekeruwo.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/risewiv.pdfIn PDF document text
    • https://tolawururajetam.weebly.com/uploads/1/3/4/8/134883146/b2d3742d4312.pdfIn PDF document text
    • http://naturmilans.fun/free_wedding_rehearsal_dinner_invitation_templates9u5kt.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/2932300.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/sekanomafip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_602d77f337239.pdfIn PDF document text
    • https://saremugofu.weebly.com/uploads/1/3/4/0/134017097/roxumiwigatepur_zeguwiboradisi_badaxibinotode_nosatizevikujol.pdfIn PDF document text
    • http://harmony-market.ru/kumofuwodubulugawosave7apso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/basic_c_oops_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/what_is_a_silk_in_british_courts.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/gutaz.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/abandono_de_emprego_aps_reforma_trabalhista.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/single_table_inheritance_rails_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/22631662543.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_off0000cf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1F 5308 bytes
SHA-256: c35b5a1ce03bd45d6544b20e3043914d44019cb0c1f7115ce5ce20b8a73086c6
font_01_sfnt_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 10940 bytes
SHA-256: d0c6fe2382bc68ee3c192f76877f1608884ac76bf1e29a7170b4c10781690129

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