Malicious PDF — malware analysis report

Static analysis result for SHA-256 21176fdad71337f5…

MALICIOUS

PDF

73.6 KB Created: 2021-02-05 22:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 53a94af652d98e55ec1628181215119c SHA-1: 450a515aac8ba4b8bc874eccc21351d367c56257 SHA-256: 21176fdad71337f524d25bb71dbed4bb4425d10a8d2f2022bcd748378e9ee019
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm, indicating a phishing or malware distribution attempt. The embedded URLs point to known malicious infrastructure, suggesting the document's purpose is to redirect users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=excel+spreadsheet+is+grayed+out In PDF document text
    • https://cdn.sqhk.co/silakozafi/hhijcjj/wiwoma.pdfIn PDF document text
    • https://cdn.sqhk.co/tazurusubiz/gfDNIha/15169343091.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/jhHhaih/90467687787.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/jcroSjc/sudoku_puzzles_hardest.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/fexenelemokopesabu.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/cRB9iax/12913180971.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/gebhdr6/strategy_pattern_golang.pdfIn PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/libip-nipen-fufuwajol.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/9176333.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/WeihgfS/junior_project_manager_job_description_construction.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/hjiiohd/rome_total_war_2_map_planner.pdfIn PDF document text
    • https://cdn.sqhk.co/belexewuwif/Mjb5icV/wipowodusanurarodu.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/zezadaxivekunikiwino.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/ahfhhhk/pujodekimusatij.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/hjaicfQ/20012024069.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/iicohfa/brief_marketing_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/ZIWIigg/79893428874.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/5gehgjc/77309458744.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/ijhgj7n/road_rage_incidents_can_lead_to_dmv_test.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/bYpMZIz/natutanugegatasebife.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/B6hgij3/fruit_blast_garden_mania_popeye.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/fomudebipefasu/10625911463.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/20611822113.pdfIn PDF document text
    • http://www.mvps.org/dmcritchie/excel/grayedout.htmIn PDF document text
    • http://www.mvps.org/dmcritchIn 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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 5460 bytes
SHA-256: 5b1ad87db1bb358313c282bd7a3ebc594b1b6d1e57ce46e21ed3287866f908d5
font_01_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 11152 bytes
SHA-256: 2a9c7ad522df44ec67cacc6d7000500e8a2447cc01e23714c65bfe23ccbad2d4

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