Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd4f5be8770cb88…

MALICIOUS

PDF

93.5 KB Created: 2021-04-06 00:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: be89c40bed9a416f9822aa22ad80549b SHA-1: 65e46a158a83505ea17e581b8f10494823c8f8bb SHA-256: edd4f5be8770cb885a302a7474d81132a574f584821ed070a87b0b1d4a97f8a5
226 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to interact with the clipboard in a way that could lead to command execution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading and executing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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://leonvi.ru/wix?keyword=whirlpool+cabrio+dryer+repair+manual+pdf PDF link annotation
    • http://digitaltoolsfor.xyz/macbeth_by_william_shakespeareh27gc.pdfIn PDF document text
    • http://english-10.site/tebonuzikomopibatojiqbz4k.pdfIn PDF document text
    • http://fullhp.info/23551439631qbl0f.pdfIn PDF document text
    • http://powerpoint4you.ru/91119439724w87rb.pdfIn PDF document text
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/xekinusupadogu_vowele_bemulabig_bawogi.pdfIn PDF document text
    • http://storeplus.pro/3981240619540o1t.pdfIn PDF document text
    • https://fodukajanewirom.weebly.com/uploads/1/3/5/3/135383911/jibiwowefa.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/sefepugolupalax/fl_commando_game_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd46a4f-c492-42d7-9bc6-5c2f93af5ccc/how_to_change_armitron_watch_band.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/19995726833.pdfIn PDF document text
    • http://pevuzimoba.rf.gd/collegiate_deca_stock_market_game.pdfIn PDF document text
    • http://mujepivetum.epizy.com/lamirivisijenevobivip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b193bc75-3a36-44d7-8a04-4dba384e3749/ford_3000_tractor_torque_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7f530c-41cc-4344-9570-4ffbc7d6ef7d/32620077233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ca8509-f267-4311-980c-9839b999e507/komesawajaxuvapamoses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5693fd52-a5e9-4ccf-9a27-ab168f130203/tizolawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cc6858-5338-40b9-a525-15a337231a7e/how_to_describe_classroom_management_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec31575f-3c7e-448a-a2d5-bba92231f5db/can_i_change_my_caste_after_marriage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8c55f0-8862-4cdb-871c-b6db6cca92c4/66531949428.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/lixafedizenebexoxagi.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_off00012ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 5472 bytes
SHA-256: 5204e920fa350f425dde063872c0852b308e29df8c3e78c177ddfb82561ebdfc
font_01_sfnt_off00014154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14154 11480 bytes
SHA-256: 1d7fb0580ff30ca424d6f23fcd01961a466d7322ce5a299c569a468e08a8de4f