Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d53d7ba4b97965…

MALICIOUS

PDF

42.6 KB Created: 2020-11-05 22:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 38f80a54b6fba2f954ce60d94e15885f SHA-1: b7b7dfd358af0fe5cb1c66a052e86b576bde7c60 SHA-256: b0d53d7ba4b9796536afc9897b7b8f26190d74f71e705494de22d42cda5ccedc
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/123?keyword=royal+envoy+2019 In PDF document text
    • https://terobatef.weebly.com/uploads/1/3/4/3/134397950/1082636.pdfIn PDF document text
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/rotudirekakelevejume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_5fa2fa150f392.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/zegabileniwiv.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/228c26ae113.pdfIn PDF document text
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/bemagawinal.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/359c731f-b3af-46a5-a0ba-50da3f9b4556/nenolopu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/cetoprofeno_gotas_teuto.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/xirof.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/nuzimilajaposegadova.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/jofolupimodiluviwimaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080d4b80-260f-4243-90e7-104d21d4bfd0/nixufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c385cf-f32c-476a-a5fa-2c0d6bf1ac4d/catering_checklist_form.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000580d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x580D 12388 bytes
SHA-256: 1139f3662222b8b3225b77285f7a0ef087c8566f5ecd04e3bffc224f556f35eb
font_00_sfnt_off000046b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46B9 5056 bytes
SHA-256: 3e7571a4e706edac253adf0524127be92a6c8b628ad8375e3186afe7ae6d6815
font_02_sfnt_off00007ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10136 bytes
SHA-256: 710ce97c3a19bd239c6b3038b21f3f715c99bc95689f528b5cf92f7832359dbd