Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e71e58b854a3b4c…

MALICIOUS

PDF

75.4 KB Created: 2021-03-28 09:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 89b7c1703af7d258e67595e4a61cbc12 SHA-1: a8049b6356b2b84544892a063bb428bdd45ce156 SHA-256: 2e71e58b854a3b4cee1b973e0f2d4ea20105571921807dddd2eb0e5944298f8c
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content. The presence of a 'clipboard command execution lure' indicates an attempt to trick the user into running commands, likely to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fokemale.ru/123?utm_term=verifone+vx520+manual+usa PDF link annotation
    • http://tafiwon.mywebcommunity.org/82467816545.pdfIn PDF document text
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/mabovudibi.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/57609755833.pdfIn PDF document text
    • https://pejolufuti.weebly.com/uploads/1/3/4/0/134018137/bumobizusinopi.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/lebugen.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/ludugafovebewif.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/nkjv_bible_download_free.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/kafabubokulu-dibubu-tajeluxirafag-pikofo.pdfIn PDF document text
    • http://febugidomoxasez.22web.org/procreate_free_lettering_practice_sheets.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/mavovebeja.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/tafogusegabomu/lusojojetox.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_c38ef1976dc144ef889279213c2347fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/rifexoketivepiv.pdfIn PDF document text
    • http://gipenebome.epizy.com/dungeons_and_dragons_5e_character_sheet_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/circuit_analysis_problems_and_answers.pdfIn PDF document text
    • http://notovagewalarin.epizy.com/25283497599.pdfIn PDF document text
    • https://24b051fc-04af-4e2d-8b9e-4e75c06063ec.filesusr.com/ugd/1a488c_040404df7a144edd89ac63257cf60c0f.pdf?index=trueIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_bb388b5bfb8e474fa3c48f44a3c95522.pdf?index=trueIn PDF document text
    • http://fararisujis.myartsonline.com/63066855101.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_off0000e80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80D 5404 bytes
SHA-256: 144490dc8c2fb8add111d4462f511968a13ae0a8558eccb5cac87ac2bb79abdd
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 11040 bytes
SHA-256: ec4b1344d21b7eb3f229c82f24b1e16a38d175c642c24a0656160f671da20b2a