Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d59fac58404ec13…

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 16:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 0d2abbab8729f1d95f34c5dc4fc223aa SHA-1: f19863acaca22ea3f9824421e486de1a4b0f6035 SHA-256: 4d59fac58404ec13ad24af7cdfc5099e9a5988de7ccfe55de375b0cbab56b4b0
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://bologen.ru/wix?keyword=marketing+management+kotler+15th+edition+pdf+free+download+ppt PDF link annotation
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/4440787.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/3139636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5ffaa98f69b5e.pdfIn PDF document text
    • https://tiwapopo.weebly.com/uploads/1/3/0/7/130739059/ebbb3aecdb36a1.pdfIn PDF document text
    • https://xupodidif.weebly.com/uploads/1/3/0/7/130739682/febop_fikolovewimimik_ludakerofuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_60179e066dbae.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/mizukasokefo.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/xuwoxuxuluvotubul.pdfIn PDF document text
    • http://leomannapov.com/soborefosie8h99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_600c832346a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5fe8fac1aed72.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/vufupu/honda_astrea_supra_100_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/fapawovixubatepokate.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/gaxizidukaxewi.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/nujezumigiluwumipiz.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_off0000d58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58E 5612 bytes
SHA-256: 7b96b6dc7084b5f4bddb4068556e36037db89c558fbdfa2ac3fb061abd152b5d
font_01_sfnt_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 10416 bytes
SHA-256: a6572d459fc96825fcb5af431ce4e377e8f3294f406c15a413d6433948ae053e