Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbaf3eb45874192…

MALICIOUS

PDF

69.8 KB Created: 2021-02-21 18:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3aa91e45ebbb2fc397f684a91f89f190 SHA-1: 0447e7697b87c86098b074569326b50197dfd605 SHA-256: bfbaf3eb4587419206f5de1c079858f72d727dd56fa60fd4dfc6387d682bdc64
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=mortal+kombat+karnage+unblocked+vendzor In PDF document text
    • http://senorifeg.iblogger.org/salesforce_report_login_type.pdfIn PDF document text
    • https://cdn.sqhk.co/volotedi/ghdjhhW/tiny_whoop_racing_office.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/pokapijepud.pdfIn PDF document text
    • https://xopilinunerixaw.weebly.com/uploads/1/3/1/3/131380618/fudanubilisi-nodom-gibivomekinot-porataj.pdfIn PDF document text
    • http://samemex.22web.org/norton_anthology_of_world_lit_volume_1.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/61583978744.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/5851326.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/WhegjEz/juzinofuminibibonofupug.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/rujimidujek/59165865194.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/75074377137.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/bleacher_report_uefa_champions_league_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/nutritional_information_of_zico_coconut_water.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/iron_man_helmet_pepakura_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/truecaller_caller_id_free.pdfIn PDF document text
    • http://rokazit.epizy.com/kebek.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/9760021043.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/60024222531.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_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 5400 bytes
SHA-256: ded0983c4181a0c1e5b0ccdc072b17b391d229b49913fe6150cf077d1ce3ed35
font_01_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 10580 bytes
SHA-256: 5abbf4cfe9384b0cea979c72cd0c4777670b6f87d830e1adcea5d5c550f798fc

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