Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a889030083c923…

MALICIOUS

PDF

74.8 KB Created: 2021-01-28 03:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 736c601e61720c9e7019a5b215c12d7e SHA-1: 36eee710884ff6eb07500dbf3afc64f98739a10c SHA-256: 56a889030083c923e450091325d851c7ea3f73dad3507130a3d1aedd1261cd30
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/wb?keyword=dungeon%20maker%20wiki%20wiki In PDF document text
    • https://cdn.sqhk.co/vowibesep/fpb4gem/34787817190.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/icjingf/gunumibozenisinumije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497359/normal_5fe656c11c2f7.pdfIn PDF document text
    • https://cdn.sqhk.co/banijuwa/idtjiic/zelle_pay_chase_bank.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383146/normal_5fcd0bc16a543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_6006126d1df21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_600a23d9eed50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_6011810b4bcb0.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/lhaQ8y8/shark_eating_whale_duxbury.pdfIn PDF document text
    • http://fafasun.iblogger.org/expansion_joint_filler_board_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/ygi2ie4/billie_eilish_bad_guy_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talakukatutevib.epizy.com/leripijafovowiwabuwasu.pdfIn PDF document text
    • http://kibululugavi.epizy.com/javufuvebotanibisepom.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/nubazuda.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/netisel.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/chemistry_textbook_answers_ocr_a_level.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/keboguge.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/plane_crash_simulator.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_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 5092 bytes
SHA-256: 2ae4d956898164fd2c5684c54fb87cfaddc0a552c949db9c3500d18ed4c58cf9
font_01_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 22376 bytes
SHA-256: 36bf59777e71d7d3edd64fefe76e46e4ea4e554075e5eaf8e53897d054c5f243

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