Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b77e4b9164338f…

MALICIOUS

PDF

76.6 KB Created: 2021-02-26 21:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 475622b02a1ca12e1ba2b5005c8ca1e7 SHA-1: eb574e4d04bc9be7729201c7aa9f87afcb7ae4e9 SHA-256: b1b77e4b9164338f0e8b783cca2ed6e529eafc0e506bfdc4bba8eb4b0346ed85
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • 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/aws?utm_term=predicas+cuando+lo+que+dios+hace+no+tiene+sentido In PDF document text
    • http://jakor.pro/27815246919kg8ro.pdfIn PDF document text
    • http://sokolov.fun/50783996000p7kzm.pdfIn PDF document text
    • http://loveworld.club/95451777531er7l1.pdfIn PDF document text
    • http://merovew.xyz/wazazusozevuwur3wknp.pdfIn PDF document text
    • http://torchland.xyz/gongsun_zan_start_guideh7gdv.pdfIn PDF document text
    • http://power-guard.shop/38152504263iplj7.pdfIn PDF document text
    • http://nesobaka7.xyz/boxatolunajulaouk8d.pdfIn PDF document text
    • http://smcjd.com/hyphen_and_dash_worksheets_with_answerst3tal.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/patomilolutepedinapez.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/kavifunaruvi/xomenafatejunegiziv.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/asphalt_8_airborne_cheats_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/69004162023.pdfIn PDF document text
    • http://mokuzamiwebifet.epizy.com/sherlock_holmes_short_stories_wisteria_house_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/king_3_report_corporate_governance.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/workability_testing_techniques_dieter.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/penguin_readers_level_3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/1729859225.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/10759731608.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_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 5156 bytes
SHA-256: b8a8869d5edb6d1e6d64c7f137559e38e0f8bd2257834d3d56d4423a00cf758f
font_01_sfnt_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 12464 bytes
SHA-256: 83cfd9f2ce88d794544369ed7e052a0e094734fc950a0d490c6bf706f463c069