Malicious PDF — malware analysis report

Static analysis result for SHA-256 61149de998f3cf9e…

MALICIOUS

PDF

50.6 KB Created: 2020-11-06 00:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3be9a55fea8cd4de8af340d52eddaf14 SHA-1: bc84d576bc91d98fc16c0f861b13e0ef9519c70b SHA-256: 61149de998f3cf9ea03c536802018d9066b37e7b63d2539edc2bab5f70f44cd4
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/123?keyword=speakeasies+and+bootleggers+1920s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f98eff2a2245.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/87dbb8e06a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8aa39e9ada6.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/xebuvuwov/look_pivot_12_vs_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac203a3a-e720-4f0b-a303-453df9761d98/autopsy_report_for_selena.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/sakawupuxexozorofeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b018c1fb-6c60-4d24-b8ac-29eae36c4ba8/gukosaxulofukab.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/q_see_qc444_remote_monitoring_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/geripakegerefatedis.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/pewajijusasu.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/20979072158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78cb74f-7fec-404a-8af1-2aec4bd00789/monterey_peace_and_justice_center.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/23031151837.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_off00008438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 5916 bytes
SHA-256: 4c453d01780faa9ecf1cbb9df1f2a6c07b39329c87a679863383427266901d8b
font_01_sfnt_off00009864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9864 11020 bytes
SHA-256: e8b24059511ab515b90382f2c2f428672c83c8d87418ba3fc137d8a0a5ae7086