Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c49ad7f83285a8e…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 05:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 800ad1100fd4a432c342f20c29c71215 SHA-1: d524405c9f655b1ab2cc8113bd33cfe550a567c2 SHA-256: 8c49ad7f83285a8e4ee0d366d297ef16ee74b0bfab5353eb74e28d2a16210ba7
196 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
  • 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.
  • 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://maypoin.ru/award?keyword=best+way+to+do+shadow+work PDF link annotation
    • http://dajexori.mypressonline.com/raroxepowewixodigewubinu.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/witalanubagagikixebiwej.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/78383070096.pdfIn PDF document text
    • https://nolemidu.weebly.com/uploads/1/3/4/5/134584078/vajabad.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/tugezaduwuv.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/do_self_cleaning_water_dispensers_work.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/38909100699.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/noxelijubefobeponewusaz.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/74244354687.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/zulosufudo.pdfIn PDF document text
    • http://lutubapowokexi.iblogger.org/travel_agency_website_templates_bootstrap.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/vokeri/65620860512.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/sennheiser_rs_175-u_digital_tv_wireless_headphones_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/phpspreadsheet_load_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/crossword_answer_for_useless_person.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/eskadron_boots_size_guide.pdfIn PDF document text
    • http://setewexevevel.epizy.com/dyer_maker_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/domestic_sewing_machine_quilting_templates.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_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 5188 bytes
SHA-256: a3eda55d5494bc7f827476345c810c9231ccd5cb8f83d55d930cba25ce924ea7
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 10796 bytes
SHA-256: def90a2bd311618cb41b71cf02d877b2dddd93206d026c1b71876a8eef4e19ff