Malicious PDF — malware analysis report

Static analysis result for SHA-256 a887949e71d40523…

MALICIOUS

PDF

52.5 KB Created: 2020-10-30 19:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 48a236ac19cdd9067591827082de4272 SHA-1: ed9e44c22847df5b933efca0ddc8a4dc483baeab SHA-256: a887949e71d40523d70d2bf0b591f8495d376ea0e129aa3ec0a1dec37e111a8a
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://cctraff.ru/aws?keyword=as+5+linguagem+do+amor+teste In PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8743987.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/lixasifasi/kitidufepukosez.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/sekuxekilisebuxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0110/8421/files/hplc_high_performance_liquid_chromatography.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/calendario_electoral_colombia_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/kijura.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/72170429397.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/radicales_libres_en_la_piel.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/vitajotisamavamipevasa.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/looking_for_pythagoras_investigation_2_ace_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1699/2958/files/36467581856.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/37428007276.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_off0000905e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 5260 bytes
SHA-256: 8af6147ad2c726785867e9015c59a099add3377c47e5be9a2f026f493d336266
font_01_sfnt_off0000a228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA228 10528 bytes
SHA-256: 890bf53c5df2eb4b5ee05c6b6a49c10f6809deafa261ff64716f34a10ec14844

Open this report in the interactive analyzer, or submit your own file for analysis.