Malicious PDF — malware analysis report

Static analysis result for SHA-256 524e76250d873ba9…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 18:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 199a1f7dc33f4e7f9ba04e2a93079351 SHA-1: 88ae130719193e0364d1c055e902fee2c6b7e438 SHA-256: 524e76250d873ba96b87c79f633214aff996f67382380340f78c9e67208df7c8
134 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 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 0.9996

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://lozipotod.ru/123?utm_term=canon+lide+120+software+free PDF link annotation
    • http://mediaverifiedbadge.com/11268471397creqk.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/ps_vita_emulator_1.4.1_download_for_android.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/kenmore_700_series_washer_spin_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/eEjgihg/xatut.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/el_alienista_libro.pdfIn PDF document text
    • http://nuzarekuzugav.mypressonline.com/how_many_calories_in_a_medium_iced_latte_with_skim_milk_from_dunkin_donuts.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/cessna_172_specifications.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/hjFhvyQ/barcode_scanner_apk_uptodown.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/7327702823.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/dunejurelupojam.pdfIn PDF document text
    • http://tosety.xyz/bigatamemufubafetijakaloxfkyc8.pdfIn PDF document text
    • http://stikc.xyz/fowoxivuxogasogeu01nm.pdfIn PDF document text
    • http://rabatil.22web.org/modes_of_documentary_nichols.pdfIn PDF document text
    • https://cdn.sqhk.co/sowotewope/fL7hjPv/finanejuvolikesivifol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwitotakego.rf.gd/kunufujovanefarixe.pdfIn PDF document text
    • http://nefenevipenexo.epizy.com/manetabuwoxisogigumegamev.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/aligning_with_your_core_values.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_bf52f647cb9d4585bc01280321d225b8.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_bbcafceb393048f9af3ac3f0cd3f89c8.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_abc1a2071340497e9205ac453d5c8c93.pdf?index=trueIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_39a57643968e48a2a1429b5d6f158034.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_9001b98318c14078b97c99a233b9037a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 5224 bytes
SHA-256: d70ff66bfefa9a1a26ca14c2bf9ff55072a3223dcd29c3ab23d92273467cf1b1
font_01_sfnt_off0000fd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4A 10376 bytes
SHA-256: 3049c72a6357367d5ea6f7d8fd95b193379abafc4b3c97bc35aa695790feeacc