Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae592bd6c1917d0b…

MALICIOUS

PDF

81.8 KB Created: 2021-04-18 22:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a4f4745312368d35e4499b955ce73bf SHA-1: 726c3be9fecc531f7950337c1f3903201f78de8f SHA-256: ae592bd6c1917d0bcb0e5d74fd2ffb1f253f8b374677eeeee065d998ae4a40e9
206 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It employs social engineering tactics, specifically the 'ClickFix' method, to lure users into executing commands via Win+R or a terminal. The embedded URLs, such as the one pointing to 'jottigo.ru', suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://jottigo.ru/strik?utm_term=what+is+coding+standard+in+python PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448535/normal_603c29acaa8f7.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/zufejixinagema.pdfIn PDF document text
    • http://dupadevoz.22web.org/stainless_steel_asm_specialty_handbook.pdfIn PDF document text
    • https://nozonefabizeg.weebly.com/uploads/1/3/0/9/130969368/rupozevezuj.pdfIn PDF document text
    • https://nolenefin.weebly.com/uploads/1/3/4/6/134629259/2999024.pdfIn PDF document text
    • http://zejised.iblogger.org/bank_clerk_reasoning_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452395/normal_6051a52d7db15.pdfIn PDF document text
    • http://pusokum.66ghz.com/catholic_study_bible_free_download.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/xavamarininere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lapesuzimu.epizy.com/garmin_nuvi_2595lm.pdfIn PDF document text
    • http://kenuxiximusopev.epizy.com/bomaru.pdfIn PDF document text
    • http://xegukamadoso.epizy.com/39364842615.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/96053839193.pdfIn PDF document text
    • http://bolilolu.epizy.com/76432715713.pdfIn PDF document text
    • http://zoxusanobidu.epizy.com/biblioteca_digital_definicion.pdfIn PDF document text
    • http://sivinufedumoja.rf.gd/relacion_antigeno_prostatico_libre_y_total.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_5b664792feea4eb1802adbab105762c7.pdf?index=trueIn PDF document text
    • http://lisuwar.rf.gd/60259320705.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/diorama_book_report.pdfIn PDF document text
    • http://sifuxugod.epizy.com/system_reliability_theory.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_1cd5ea178d7b4506b8c3e9baf46ca1d7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5416 bytes
SHA-256: 791837e32e55b5c15a827c6fffa41a9a3d07c4f805c42b83407785ea8823f417
font_01_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 11340 bytes
SHA-256: 1da86348e423f15c64e4612ecb5d6fa7d521690b44f10182c1a90497ad19ba4f
font_02_sfnt_off000123e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0