Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b74e3f6c74d623…

MALICIOUS

PDF

41.8 KB Created: 2020-11-05 20:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: eee9bdabc0c392989fa7a30b91b8fce4 SHA-1: 15a4b72bac4d21cc0636d7730cd9f3c0cdcae2da SHA-256: 91b74e3f6c74d623296b92d2aed632ba0455787ca69f449a9a1e6de75c3505bc
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://traffset.ru/aws?keyword=deviantart+users+login PDF link annotation
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/wuxikojaxo-xokoviradi-memudedu.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/kativutagolilon_nadovorimof_vafovemoli_liwan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fe0aafeb-4f2f-4604-b6d5-8ed21bdb436d/yardsticks_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c991f056-8cb3-462b-b9f1-210e854d2771/dururekapilakivodon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76e5daa-984d-4fe8-afb7-a269fbbb6b39/fexarifaberuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380eba8b-89aa-4e99-9c93-0c07b87363df/63736021028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac633aa-0c68-42ad-acf6-25cf8ef528ab/vigasojorupejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728c5fbc-35f7-4cee-b2e5-832e600762a1/snake_cool_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d139c755-02f2-41d9-af7a-f8f79f412c9c/10919684619.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/autocad_learn_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efd1672-0b22-4715-a87e-c501c2dab600/doterra_microplex_vmz_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/tamil_news_paper_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/lacrosse_positions_on_field.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/commando_assault_3_unblocked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C7 4792 bytes
SHA-256: fcbc3bb5cdd3ba51e73f9f81d79fd7e21324513bc0b9e5ad8c2744ca82992421
font_01_sfnt_off0000672f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 10956 bytes
SHA-256: bda1c2257f2c427a974a868169cb80c64f358e6174e8d5ddb098f14790db22b1
font_02_sfnt_off00008c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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