Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad57a27e23d36b0…

MALICIOUS

PDF

41.3 KB Created: 2020-11-09 02:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: f25206f77318bf4cd156660a619b751b SHA-1: 1664420619b1f494ddfc1ec4eaa90a03fe03bcf3 SHA-256: 9ad57a27e23d36b05d8ab35f1d189f49d3e93294c545a26120fa5647789f5cd5
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffset.ru/aws?keyword=martha+stewart+s+key+lime+pie+recipe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87768230975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f947a46529c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5fa847a6e205e.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/4727353.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/mezezenole.pdfIn 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/824689a5-4639-4b1e-a744-b8db8a89e50c/luzoralawuzada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db8002b-f297-4294-80ef-fbee9ed66257/free_live_hardcore_sex_cam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98af4d23-dc19-447b-a1ed-9261066724e1/17189247599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541bf660-9dfd-402b-80d1-207e1e29376c/13314298909.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/st_catharines_standard_obituaries_2018.pdfIn PDF document text
    • https://ligakojuso.files.wordpress.com/2020/11/the_wave_todd_strasser_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3490e3-a3d5-42e2-9d07-7f2f91bc10ca/quotes_about_blindness_in_king_lear.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/al_waqiah_latin.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/pejumudidopuzameb.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_off000060c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 5436 bytes
SHA-256: a16ea2079998ad712338721d63c6fdc63b28b8888dd00ef8da824ee79e24dc5a
font_01_sfnt_off0000733b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 11056 bytes
SHA-256: 75d83766f30590355e507122d3e2a156f598c92b0b87c5f59f05aa12b7de1dd0