Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23fc4ab12f95427…

MALICIOUS

PDF

72.1 KB Created: 2021-02-16 04:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 349238c410b57e401bf44d23af8e3046 SHA-1: e7abb28ce9ee21367640ca0e3f263c17f3641063 SHA-256: d23fc4ab12f95427f758fc9d626678d26535f2ff94d8b62a8cbd9cb4dd1a7189
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/wix?keyword=bj5+guide+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456140/normal_601e90e2c0645.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/jajfia7/warcraft_3_reforged_tower_defense_maps_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/ijcYiiK/74609007450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_6016f3cd172e9.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/gi8EifW/freeze_drying_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5ff65b5e1fe24.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/i3X2iad/99024926423.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/ghjhcia/multi_line_video_poker_free.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/zedilegol/holding_hands_meme_template.pdfIn PDF document text
    • http://fesusate.rf.gd/liabilities_reported_on_the_balance_sheet_include.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/microsoft_sql_server_2017_express_installation_guide.pdfIn PDF document text
    • http://fukasutatota.rf.gd/chloroform_in_the_drinking_water.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/51292292690.pdfIn PDF document text
    • http://xesogopobatobop.epizy.com/fupezesikuv.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_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 4820 bytes
SHA-256: 94611666952c8c136b0ca28a9bb60f9cd8e2c39923d60cefdb74bcc8658d82f7
font_01_sfnt_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 10804 bytes
SHA-256: b2ce1baba17014c4bd838b83495fcca7e3142cb838d099560727b2c2da4738e1