Malicious PDF — malware analysis report

Static analysis result for SHA-256 491b20b454057e59…

MALICIOUS

PDF

77.7 KB Created: 2021-02-16 13:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2fc9771a7556275e5205f4337196b5a3 SHA-1: 8f57a7553683fc67e2a83cf211ab5f4784a9ce1a SHA-256: 491b20b454057e59a948e726fdee09f3750706827f9608c5a6ea0069a1046b68
206 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and social engineering attack. The document instructs the user to copy and paste content into a shell, a common tactic in ClickFix attacks designed to bypass macro restrictions and trick users into executing commands. Multiple external URLs were extracted, suggesting a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+install+windows+7+from+usb+pen+drive+step+by+step+in+hindi PDF link annotation
    • https://cdn.sqhk.co/sanevujaguda/gehighB/running_on_empty_meaning_slang.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5fc798f6d38a9.pdfIn PDF document text
    • http://myfirstsite.xyz/allianz_ovhc_insurance_claim_formjju4e.pdfIn PDF document text
    • http://kyponnik.online/vice_city_gangster_download_for_windows_10xe045.pdfIn PDF document text
    • http://hookup154.space/17556374516v3cgg.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/zgcbhaw/house_paint_colors_images_outside.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/gihcegh/92421136787.pdfIn PDF document text
    • https://cdn.sqhk.co/guludagew/1ZjjidU/fawukidopekevenexas.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/2jaibqV/twitch_alerts_not_working_on_stream.pdfIn PDF document text
    • http://sqrab.top/94185212191t5hzl.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/bCjaSRS/silicon_valley_techcrunch_disrupt_presentation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454180/normal_5ff811f7cda6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_601b293d85202.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/ianegjl/jamumeripovuzafabos.pdfIn PDF document text
    • http://setiwevosina.22web.org/hollywood_movie_website_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wijogural.epizy.com/vobugidodutesumusu.pdfIn PDF document text
    • http://safefimij.epizy.com/year_3_science_worksheets_free_uk.pdfIn PDF document text
    • http://gizogebinide.rf.gd/baar_baar_dekho_full_movie_online.pdfIn PDF document text
    • http://nadutalafex.rf.gd/febep.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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5716 bytes
SHA-256: 8ef187510e2783dc4a251567780ee336ab1e6c64eb207f682e24973890d6423b
font_01_sfnt_off00010587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10587 10296 bytes
SHA-256: f3cd4c834f0679f54a677f689ec0660c08bfc367a67e9991395e85dfef23f481

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