Malicious PDF — malware analysis report

Static analysis result for SHA-256 53396190d5bb85b9…

MALICIOUS

PDF

66.7 KB Created: 2021-01-20 10:31:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6e55b572d49ac5508fefae872db9d35a SHA-1: c1fb594188298e09d504de7afe4228df6509db10 SHA-256: 53396190d5bb85b94d029fb12afa9708a3bad7eafeaa908af6d829ed70a9fb14
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=microbiology+an+introduction+12th+edition+test+bank+pdf+free PDF link annotation
    • https://cdn.sqhk.co/lilavokolet/e0twRij/67345194479.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/dowanimajo_nosaj_wuvewi_xeniwixurufom.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/ia3ja4R/samsung_music_player_apk_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/Egehajd/23516190247.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/kubizamepipe_darewa.pdfIn PDF document text
    • https://cdn.sqhk.co/wixakulu/jv2jaMl/cook_county_recorder_of_deeds_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/iiYaUzp/best_boss_office_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jggcjgQ/shifty_jelly_australia_weather.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/pajukovuxetu/report_assemble_gnrale_sarl.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/37599799694.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/accelerated_reader_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/personal_finance_balance_sheet_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/2332937195.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/7941244773.pdfIn PDF document text
    • http://kovawasokagi.epizy.com/banquet_event_order_template.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_off0000c257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC257 5912 bytes
SHA-256: a773a5797a38813f6fa2941545344f1ef2af1c647a345b3f69eb9d3232ee5f92
font_01_sfnt_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 11044 bytes
SHA-256: 11cff75e43dd8b99925f214f0e98b417e2430a1eca3c7c35e7ccc647345376e8