Malicious PDF — malware analysis report

Static analysis result for SHA-256 709caa429af171ed…

MALICIOUS

PDF

69.0 KB Created: 2021-02-19 03:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4eb3348feff84825ed999c7099d835cb SHA-1: 4b0869b9a7b40b18cb230b79564122ee67f20e61 SHA-256: 709caa429af171ed072ded0b8c8ea57fd23019ee63ae04c6957182c35c4c51bc
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=veterinary+directional+terminology+worksheet In PDF document text
    • https://sixagezox.weebly.com/uploads/1/3/1/6/131606695/defidomosuxuvox.pdfIn PDF document text
    • https://xasavogo.weebly.com/uploads/1/3/1/8/131856096/lelanujogun.pdfIn PDF document text
    • https://bikaxumipot.weebly.com/uploads/1/3/1/6/131637137/zefatili.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/hcghVhg/back_wars_mod_apk_download_android_1.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/barig_lijad_gozapularifa_ladapudesasogow.pdfIn PDF document text
    • https://favigexa.weebly.com/uploads/1/3/0/7/130738696/viwuwusew.pdfIn PDF document text
    • https://wijideziwu.weebly.com/uploads/1/3/2/3/132303229/kuximesil-denud-jevazelunogak.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/4Mhjghb/wigudowuzovoj.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/3df668f.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/38813b859050.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/a15a25a041a.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/ggkigjh/juventus_logo_old.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/jivala/44868747436.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/53613220768.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/mivujukagiwovukola.pdfIn PDF document text
    • http://nenedabex.rf.gd/sopanon.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/wabevunovudo.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/integrated_chinese_level_2_part_2_teachers_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/obc_caste_application_form.pdfIn PDF document text
    • http://kipixuge.epizy.com/welivaxaxifopelosubexo.pdfIn PDF document text
    • http://dapolejalufimi.rf.gd/gelagexexopolopimub.pdfIn PDF document text
    • http://kogopixipinal.epizy.com/17456490289.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_off0000d07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07C 5576 bytes
SHA-256: 883ae76a38607cab8ebfc67a8c9d1b087b37a17686c7058c57fda0fafa74e40b
font_01_sfnt_off0000e366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE366 10208 bytes
SHA-256: 30a896b33a7f665d92da39cc527ab0d7f1ca05c1459cfbf1eff58c2d9f4b2e80