Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8ca2f251b0f919…

MALICIOUS

PDF

72.3 KB Created: 2021-02-17 04:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 20d4d03b9e48190b3b97cf43db628bd8 SHA-1: abb71b191e5f5f6c94e754239b06dcd4f0199de5 SHA-256: 1a8ca2f251b0f919895766a6d4d621841f033de21541b746836eaa46f52873ec
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jottigo.ru/wb?keyword=how%20to%20tell%20if%20maytag%20washer%20transmission%20is%20bad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5fc65de9b8519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_601f7f117461d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421966/normal_5ffb3cc35849e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369638/normal_5ff23768c7f2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5ff5f8a1b354e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fc76fe9657ac.pdfIn PDF document text
    • http://crispyset.online/408634221000q7xb.pdfIn PDF document text
    • http://bit7.top/fugepujupaxitiloxerinex5nn9g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423429/normal_5fd0663a10797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_602c691991b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fda0f60f3e98.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/fupanabivote/zubudozilenofeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/30699100586.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/eviction_notice_template_alberta.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/81204747306.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_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 5616 bytes
SHA-256: 871e1489864bd0479a6a5dc98c3124415226b76df3b73302d881273ac42d8865
font_01_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 10504 bytes
SHA-256: f3e678c8a4f39bce9a7c437411f422a6e2ba52dc2416ab7b4b00a695343f080e