Malicious PDF — malware analysis report

Static analysis result for SHA-256 813b8f1d515aded2…

MALICIOUS

PDF

83.4 KB Created: 2021-05-08 18:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 83f82359c36f26390e79374e2ec61821 SHA-1: b23a9d046feae44c2bcd914c0fe16a0980138f4d SHA-256: 813b8f1d515aded27d59a45493bd98a2f5a8c62ce463205648e6819f662a70a9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by a ClamAV signature and an ML classifier. It contains a lure related to 'Skyrim speed up time command' and a high-severity heuristic indicates it links to an SEO redirector, likely for phishing. The embedded URL https://nipisod.ru/strik?utm_term=skyrim+speed+up+time+command is the primary indicator of this malicious redirection.

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://nipisod.ru/strik?utm_term=skyrim+speed+up+time+command PDF link annotation
    • https://cdn.sqhk.co/nisugavu/7jeojfG/aapl_dividend_increase.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/VggyH5q/matriz_de_analisis_foda.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/kiwutufomolilibezimimekom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_5ffd0c502c1f0.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/buposovifolixaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_6035e36a1be0d.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ahcz6La/shut_up_button_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/rijolumexeb/II3qPgc/la_vie_en_rose_ukulele_chords_chloe_moriondo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakarajibap.myartsonline.com/maqbool_astaghfar.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/petiperasi.pdfIn PDF document text
    • http://lowuguja.myartsonline.com/bottom_up_theory_of_perception.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_ade19de940ea4ceeb7595498a114b283.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_a98d2423b12c44eda4ff84b65c8d1fd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/what_is_the_highest_point_in_jerusalem.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/emerging_approaches_to_educational_research_tracing_the_socio_material.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/vumaxozuvenad.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/2005_honda_pilot_4x4_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/appdater_full_apk.pdfIn PDF document text
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_5b8fe3b2f9fd4834bf4738bd229aeb88.pdf?index=trueIn 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 8

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_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 5456 bytes
SHA-256: 7b977f79c3f60e56194ffd74dbc4ae4dd882b946ac663e976899bbf81b4963c8
font_01_sfnt_off000117e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E7 12240 bytes
SHA-256: c7f5d3044733f2f03332fd4de796ebbdf4ff0d70a21b37c5cd9baa410b19d02a

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