Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6862d591dc1d0da…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 04:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 49b3afa662929d889d74621742f0117b SHA-1: bdd8343ff2565db8d8967c49f278d43ab276eeea SHA-256: b6862d591dc1d0dacfb0ce57b1d9ea233ddb84ccdf69c7d8de100bcc8a00370f
134 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 and presents a deceptive download button. 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=ttmik+korean+verbs+guide PDF link annotation
    • http://fumuroruzej.medianewsonline.com/the_art_of_war_bangla_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/bhhbrhe/paintball_explosion_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/mifaruzamexu/eF5KhcJ/call_center_workforce_management_software_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5fe2a36ccc872.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/hjRjjic/varus_deformity_of_calcaneus.pdfIn PDF document text
    • http://kajipim.mypressonline.com/up_board_class_12_maths_syllabus.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/semebojopupuf.pdfIn PDF document text
    • http://gutudixob.iblogger.org/mozilla_firefox_app_for_windows_8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fc60712ec9e6.pdfIn PDF document text
    • http://mozujana.22web.org/zexovegebezadatas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_67512b632b2f4edb9596a1f76cf8537f.pdf?index=trueIn PDF document text
    • http://dupikupujetilu.rf.gd/xikulobinubep.pdfIn PDF document text
    • http://vabagez.rf.gd/50518947982.pdfIn PDF document text
    • http://mafofeguf.epizy.com/jcaho_sepsis_guidelines.pdfIn PDF document text
    • http://rofixalo.epizy.com/29041940982.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_fbf34f22222c423485c7765a87c4072e.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_eb3041c0b0864044b0ba98e1116cffbc.pdf?index=trueIn PDF document text
    • http://tezegizutisijo.rf.gd/fegexinipo.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/surge_arrester_calculation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 8268 bytes
SHA-256: a34d7405b4b78adb48135bbceb6f6c0c6ef79290c3ef0d037989fbf92b305f83
font_01_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 5324 bytes
SHA-256: 26ef9c6782b39803a2ad0028ad1de0f40a24c0d4d40aa6ae312124e35fb01f20
font_02_sfnt_off000123b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B6 11112 bytes
SHA-256: bd11366a2e12ead01d610c0fc3a90d4f9377fc9ec3d8a12abf0d546a7d537ecd

Open this report in the interactive analyzer, or submit your own file for analysis.