Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93dd31e05718be0…

MALICIOUS

PDF

68.4 KB Created: 2021-02-12 12:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf80d337741737f2b4e91058ef30c484 SHA-1: 6c41fb9222e3163a51d57763b3ac92d53aad97e0 SHA-256: d93dd31e05718be045a8012862b384a4c74dcf515c9201b301e85f9e5b0b8c86
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://druttle.ru/aws?utm_term=l+movie+cut+songs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5ffd13537a9ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_6003bcb80a843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_5fd6527d634c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fdc03b4d0e36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_5fec86e5df597.pdfIn PDF document text
    • http://websecurer.tech/vusupalajaratidijuzubi0n3.pdfIn PDF document text
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/9513158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413566/normal_5fef3e9bbee26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_601484a8cb283.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/3363089.pdfIn PDF document text
    • http://cancandance.org/bsc_nursing_1st_year_syllabus_ruhsx8n5h.pdfIn PDF document text
    • https://gedibaforajipet.weebly.com/uploads/1/3/0/8/130874683/boxixivomakin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5fcd3e7dddb5a.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/jujojomojemiz/nobunenobewegoboxal.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/zozutupo.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_off0000d167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 4780 bytes
SHA-256: 5f666044e3127dc7e4fce9d6aa20f2e0af3aedf5d5845c9f2aaf8e59ce575769
font_01_sfnt_off0000e1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 10412 bytes
SHA-256: 0bc45bd0e2ec4cd6bad6d68477bf1acc6fb23fec75df2378f50e74182b3db16a