Malicious PDF — malware analysis report

Static analysis result for SHA-256 131febbf237069ec…

MALICIOUS

PDF

65.7 KB Created: 2021-02-27 21:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b14dea69621b09a095a57d082ec107d5 SHA-1: c6168d159b6f3cae2c06587b769e7479e2f5cc10 SHA-256: 131febbf237069ec065e38f43a846560f4c35d99f972787742ec30915c1dd820
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to "Famous english writers photos with names" and embeds a URL that functions as an SEO redirector. This redirector likely serves a phishing or malware payload to the user. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing campaign.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/strik?utm_term=famous+english+writers+photos+with+names PDF link annotation
    • http://tonedomopoja.scienceontheweb.net/kunowiwegax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fd34a51246dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_602da7047bd68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe15301c610f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_602c9ea81456a.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/8wIZPGU/nanirate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_602800eda4fd2.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/vufurovogivewip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_601d4d1e21f25.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/realidades_2_textbook_page_50.pdfIn PDF document text
    • https://cdn.sqhk.co/fifunolew/CoKjcWf/teguraninanoxufef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_601b6ec586bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_600ae8fe078d0.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/TUaG2S4/black_labrador_retriever_christmas_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/GbslgdP/ben_10_race_against_time_full_movie.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/lofese/bomamo.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/breakneck_mod_apk_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/buzovifunepamawazezigebu.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/american_eagle_jobs_application.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC642 5280 bytes
SHA-256: 54e0b79a1df9bc12f8aa887955cd7f3f41cc13d9c28a6081481b1277aefbf7e1
font_01_sfnt_off0000d821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD821 9776 bytes
SHA-256: dc2942ec4c07b550665152a9c734bc3fcec64fdf37b9930348895e3c3ee10b19

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