Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea949307651a69e…

MALICIOUS

PDF

78.0 KB Created: 2021-02-02 09:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ec165b09c762df3d86ab82f93575647d SHA-1: b7ba0b98b3e00e5fb19dc73951f7b71d33bc9f43 SHA-256: 4ea949307651a69e41f099e5ae3722f262006d47cf2425c5421553e9c0c25524
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/aws?utm_term=cms+website+templates+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5fef7aafb8e5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fca10def2fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_6010030ce3c78.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/9427358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff2df2b1e458.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/d09b0ab76c.pdfIn PDF document text
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/zamewuzanotameke.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/nivutupipu_xevujor_xirerivaxowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fc5ec7071a57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372985/normal_5fcdd0576f23f.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/gaxuremewuger/mobogenie_app_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/buvetuvolem.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/nutoxuvirovubusogaze.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/wiponewimazidote.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/giwadokep.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_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 5184 bytes
SHA-256: 1f3735ac1807110466423905f23f50054caf5a10f38ec2cdae7b7f0f85e561ca
font_01_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 10344 bytes
SHA-256: b858aa6e6190ff40ccac700a59dae7db8664a06704de072993bca1e9f5e5b696