Malicious PDF — malware analysis report

Static analysis result for SHA-256 9418916070e16a0c…

MALICIOUS

PDF

80.8 KB Created: 2021-02-22 10:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b3dd70e41daff9b60f1381275da8d0bf SHA-1: 9befac728cf421b8197047c28534fecc66808cfa SHA-256: 9418916070e16a0c6178bc7bd8faee29003a59c0315885cea54469bdd54bf265
186 Risk Score

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/123?utm_term=warranty+forever+rv+dealerships PDF link annotation
    • https://dagaroxir.weebly.com/uploads/1/3/5/9/135973008/7de97ec.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/BIuIicE/get_list_of_sheets_in_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/hrggBic/kawenuxebek.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/hjHiaOl/fortnite_gun_sounds_download.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/xonet.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hgijdhh/kingdom_connection_email.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jihidji/54063509335.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/j36gdje/zombie_top_online_shooter_android.pdfIn PDF document text
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/wipisurijujib.pdfIn PDF document text
    • http://xijewaka.22web.org/runejupodanewu.pdfIn PDF document text
    • https://kapofered.weebly.com/uploads/1/3/2/6/132680839/5885727.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/lofese/28634648832.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/41308415913.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/38473349270.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/21707665792.pdfIn PDF document text
    • http://xiteberukebeki.epizy.com/xufogojil.pdfIn PDF document text
    • http://kunizifafam.epizy.com/free_ebook_templates_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/cron_job_schedule_format_online.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_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5304 bytes
SHA-256: 173b3fc61df93509ebeec963e998c97a8419103b89cc7313aaffd8ab5ba2ef91
font_01_sfnt_off00010fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE0 10668 bytes
SHA-256: b33cb619d75620f24d1809c4e9010c36678bb82668f53fa5423525e78843e036

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