Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15d40091c667bcd…

MALICIOUS

PDF

89.3 KB Created: 2021-02-16 06:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 383a535fea5cf5b4ec61eda03e0a295a SHA-1: 6b2612638775dadc5b85b3197e3de796169f01cb SHA-256: d15d40091c667bcd1f40c917b817fc35aab62c461e15d10d1f40ab7a3ac140fb
196 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
  • 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://jacksth.ru/123?utm_term=darwin%2527s+5+points+of+natural+selection+answers PDF link annotation
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/jerite.pdfIn PDF document text
    • http://hookup157.site/44444275571ejwqb.pdfIn PDF document text
    • http://strahauto.website/background_ppt_elegantznhq9.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/vovub.pdfIn PDF document text
    • https://mutudibekakifu.weebly.com/uploads/1/3/1/3/131398274/lixaludutevevu_menesix.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/1640603.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/813336.pdfIn PDF document text
    • http://romeita.space/breakout_edu_answers_spooktacularnn42r.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/vofagikoxor.pdfIn PDF document text
    • https://lajexupizad.weebly.com/uploads/1/3/0/7/130775806/7849658.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/wujapu/92460578499.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/kesalixuzalonaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/lavelaxigikudi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/bromocriptine_mesylate_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/18896842760.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_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 5260 bytes
SHA-256: 378158cbfca6ed81379e9775a55ebfe3b6c8e5d4b8de968f95baac253c9b8ad5
font_01_sfnt_off00012ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE7 11496 bytes
SHA-256: 0e0d801ff71ff6d9f21b7523393559358375441eb98e21258163612edb71d88a