Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eadaf89cd36c7cc…

MALICIOUS

PDF

95.6 KB Created: 2021-01-27 12:56:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e5525413884c3e9219256a1873406658 SHA-1: df651a3cd64dba20119bf5b7d0e255e492527cd7 SHA-256: 8eadaf89cd36c7cc0e72b6a976d922d06a1afe5160d2984978d17b48027d798e
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 alert for linking to known malicious redirector infrastructure. The file contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=fisher+elementary+school+richmond+va In PDF document text
    • http://lnstagramverifiedbadge-media.com/5319620109976ofu.pdfIn PDF document text
    • https://nukoxifade.weebly.com/uploads/1/3/4/3/134332817/3896161.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/c3c6e25c.pdfIn PDF document text
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/dewelizumo.pdfIn PDF document text
    • http://goldstein.capital/19612188801u8n4y.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/zexilodifomofuv_wezezafux_vijetujodejeno.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/wegonugipup.pdfIn PDF document text
    • http://dostafood.xyz/35815563769596hq.pdfIn PDF document text
    • https://nitipitu.weebly.com/uploads/1/3/0/7/130775162/zabudimukumises.pdfIn PDF document text
    • https://bufodenoziro.weebly.com/uploads/1/3/4/5/134585066/bujagesironivupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewodup.rf.gd/bootstrap_4_template_free_simple.pdfIn PDF document text
    • http://warepeg.rf.gd/65050602402.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/bromine_dioxide_information.pdfIn PDF document text
    • http://repofifimi.epizy.com/pugorud.pdfIn PDF document text
    • http://kunerev.epizy.com/61288424153.pdfIn PDF document text
    • http://ximolamerojizud.epizy.com/best_3d_song_bollywood.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_off0001394d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394D 5296 bytes
SHA-256: 2007be48471358bf19871c5e17a02f2d6ebe4de435cde3bc6793014729e43af8
font_01_sfnt_off00014b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2C 11824 bytes
SHA-256: 392f44d9805f11fc2734cad768da127728f3d0fbd9b2ff66a4a86a03c550a379

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