Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0766cd4972db5f6…

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 20:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 51e1423381fb147ea285c86290f6b8f9 SHA-1: b8a015c200bfcf633fc9d5f87b6107d5326c1f3e SHA-256: d0766cd4972db5f6eb5a0356721f499d0d55709c13f4ea785ae8a484fc9e0326
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score strongly suggest malicious intent. The primary URL identified, 'https://maypoin.ru/wb?keyword=olympus%20om%201%20price', appears to be a lure designed to attract users searching for specific products, likely leading to a malicious payload or phishing page.

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
  • 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://maypoin.ru/wb?keyword=olympus%20om%201%20price PDF link annotation
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/tabavomubun.pdfIn PDF document text
    • http://ripelavezomosiv.iblogger.org/94345916411.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/luraxunebufu.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/depovisepuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_60186ca743a7a.pdfIn PDF document text
    • http://pupesotiv.22web.org/tufibunesukisajizovazilid.pdfIn PDF document text
    • http://classicalnaturally.com/certificado_medico_gratuito_boliviaopxti.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/57214522578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_601b7d08419e0.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/86822419168p2v5f.pdfIn PDF document text
    • http://polfact.site/vetituduvufokagomivuzb1n18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_60209704434fd.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/sewamabapudajanudef.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/7bffb272a2477.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/wunovisaxi.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/jubiferekaka/65883544606.pdfIn PDF document text
    • http://rukotig.rf.gd/citizen_navihawk_jy8030-83e_review.pdfIn PDF document text
    • http://jefuxod.epizy.com/53328022909.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_off0000d1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A6 5052 bytes
SHA-256: 773d589dc239073d5e1894b6355b32ba254f2f7dbddc01810ab88eb6338e57b9
font_01_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 12252 bytes
SHA-256: f3035db4d24c56f4ee82f82602d92a2ada71a6ab60dfa14acd3fa7a0bca5558b

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