Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41f3351db219fa0…

MALICIOUS

PDF

69.4 KB Created: 2021-02-23 19:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 06fd077681936bf71ade65906581fb43 SHA-1: ad783ef5aa27154e324299eec22f8d4540cab9ab SHA-256: a41f3351db219fa022ecee8e4533ba63e1507b2c8d6b271891db5a67ef70d241
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://baarspo.ru/wix?keyword=stardew+valley+indie+guide+pdf PDF link annotation
    • http://rankingcoach-seo.com/dibudexikenobulirumowoboh5h76.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/masukafebudi_patikafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_601a83bf48e16.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/xIEuMij/warren_city_ohio_water_department.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/rebanogiwoke.pdfIn PDF document text
    • http://padlamadla.site/riesgo_cardiovascular_definicionry0fk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ff695d5539fa.pdfIn PDF document text
    • http://hookup750.website/lurelijakatsubvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_602cf31a67465.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/sikatadowiju-weginefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_601a6688234f6.pdfIn PDF document text
    • http://sosed.market/what_is_inchoate_offenses_lawbt2h7.pdfIn PDF document text
    • https://xadixolikiz.weebly.com/uploads/1/3/1/3/131380305/65e6b1b409e4.pdfIn PDF document text
    • http://lnstagramverifycentre.com/974359074950kqe6.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/dukajevo/72633946567.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/critical_ops_mod_apk_ios_no_jailbreak.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/12520824961.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/balanebofabejoxokakogegu.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_off0000d37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37F 5388 bytes
SHA-256: 9667608ce39fc4b3d9e79604b8ea07905e30840267eccc30a5af463e14aa5404
font_01_sfnt_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 10264 bytes
SHA-256: 0bff5ed40a32f2095fc5b8a17e910bcbe929680ec6f0a2a95da364bcf6b7dc0b