Malicious PDF — malware analysis report

Static analysis result for SHA-256 69240d1339cd9924…

MALICIOUS

PDF

93.7 KB Created: 2021-02-21 11:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5c14f4b968788da6a3267d11e87759ee SHA-1: 4cad41742f06e263cc0ad21a648eb42d548904b6 SHA-256: 69240d1339cd99242870d1a7edfd78c8f5972b6fbd070a1618e8490d2dea59d0
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs suggest a phishing or malware distribution attempt, likely masquerading as a worksheet. No scripts were extracted, but the presence of numerous links to disposable hosting and redirectors indicates a clear intent to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/wix?keyword=percent+composition+empirical+formula+and+molecular+formula+worksheet+answer+key In PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_5fe0bfba23232.pdfIn PDF document text
    • https://kamobukumigudeg.weebly.com/uploads/1/3/1/0/131069934/zigenusitazo_jejeni_nolugoripana.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/kagagij.pdfIn PDF document text
    • https://putavoguxula.weebly.com/uploads/1/3/5/3/135325624/mamiwomo_sijorutudixa_lixuviga_wigafejolesol.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/igihr5J/residence_inn_long_beach_willow.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/YBgeKjd/72552634455.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/jgghhfw/65581974083.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/e88b42c.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/joroguxugowatud.pdfIn PDF document text
    • http://sigifiketatoge.22web.org/68432084086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3b3b14f276.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dpdjjV8/pilimizexijomarol.pdfIn PDF document text
    • https://zukaxalu.weebly.com/uploads/1/3/1/4/131406202/3e113fb8a97.pdfIn PDF document text
    • https://bomutakarekavag.weebly.com/uploads/1/3/5/3/135330682/3194588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suxikikafib.epizy.com/wupavi.pdfIn PDF document text
    • http://wanabovemuzume.rf.gd/adobe_to_word_converter_not_working.pdfIn PDF document text
    • http://jebefufodapiwi.epizy.com/55263776907.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
    • 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_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 5652 bytes
SHA-256: bf7f0f034bd78e0ae7b2aaea6227f786dcf292697711179053d242b1406c809e
font_01_sfnt_off00012253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 15436 bytes
SHA-256: 8e81e68d428485d8ad7ef2205959a54b5ac268ecce26b72c4d04f32ae1f475b4
font_02_sfnt_off000152cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CC 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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