Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0d6f368210f7e2…

MALICIOUS

PDF

77.8 KB Created: 2021-03-30 06:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d102519a7162da3410e929b1b0a503f SHA-1: 93ad076629ff81e997891d4fcffc36c395754255 SHA-256: 5f0d6f368210f7e20edf1c87c03c3ae34ad8d39ce713d87e9d28013e0d1db293
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://nipisod.ru/123?utm_term=apple+developer+account+s PDF link annotation
    • http://lazokiwumemo.mygamesonline.org/refazul.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/b8deb57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_5fc7d973b75f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_605304db2408f.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/fifth_grade_math_workbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377924/normal_5ffc7fa71f9a5.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/58143076264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_604e12810abb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_606284009f97e.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/where_can_i_find_republic_of_tea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_5fccf7ce3ecf6.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/winoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_b29858a112fc45ffa28852ad5d3b5246.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/622bfd83-ed40-4452-bfb1-059c465d535a/fedex_customer_service_in_spanish.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_8f32b2838e264835b305033e021db248.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c907361-57d6-4d2c-a909-0f90b738caa3/why_did_he_disappear_and_then_come_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4a7d2d-c470-44d7-8047-4b6825b408a6/caroline_knapp_drinking_a_love_story.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_1065464824d141528c50b6e9f3a057b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63dc13f-5ca8-4302-99d7-057a55eabdb9/pazukubijozoz.pdfIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_25d011e94b814058a29d0b55533c1978.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_3bb5d8be95f54b68b637c4e4ebe05a06.pdf?index=trueIn 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_off0000f319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 5116 bytes
SHA-256: 072fabd3fa7aa3e1c31a8e6ca73ecf5f20fe0631c95ba9be9488f9b0d4b80224
font_01_sfnt_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 10976 bytes
SHA-256: 6e8bdbd842c074b92c66f04133fef894612d1404830353ac5440cd833e389220

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