Malicious PDF — malware analysis report

Static analysis result for SHA-256 728ad7f7ed8bc2ea…

MALICIOUS

PDF

79.9 KB Created: 2021-02-22 23:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d46ec7ed3cf5099ba2b42c7d94627505 SHA-1: 416deebdc542989ab9fe92e331f082e4c0ead158 SHA-256: 728ad7f7ed8bc2ea0a5a07d345bec1857821b02b99f582f0cec60f600aa85578
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://crophysi.ru/wb?keyword=meade%20227%20telescope%20parts In PDF document text
    • http://niripat.iblogger.org/peavey_6505_mh_review.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/juvipafezon-mibovodosisoxi-wajemop-xosetapu.pdfIn PDF document text
    • https://jinidodax.weebly.com/uploads/1/3/0/9/130969434/kikezivulagoxe-sumosowi.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/haVZjae/farming_simulator_14_game_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/jhcihic/police_officer_killed_today_greenville_sc.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/football_manager_2019_arsenal_guide.pdfIn PDF document text
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/a8a4a47fbb1.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/3238425.pdfIn PDF document text
    • https://cdn.sqhk.co/kukojuvata/NZigfYl/jadur.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/rumonozevidafag.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/c505050d3aaaa.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/TICibwt/frases_cortas_de_la_vida_tumblr_en_ingles.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/donukadizolin/fibepewod.pdfIn PDF document text
    • http://bejopirobi.epizy.com/gbc_emulator_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/naberodubenafifunapofasid.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/71157571937.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/cheran_express_platform_number_in_coimbatore.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/imperator_rome_carthage_guide.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_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 5284 bytes
SHA-256: 696e177b9b1c7fe327f93ab7f0c50f3515d1292a0bd63d658ac54714676d591a
font_01_sfnt_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 11092 bytes
SHA-256: e276c39895e772508ea0e487204dd0a2a3241b76f5796c8011f129c14bf018ad

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