Malicious PDF — malware analysis report

Static analysis result for SHA-256 349bb4bd5008e008…

MALICIOUS

PDF

45.8 KB Created: 2020-11-04 06:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9e7770dfe718bc628c265503c063f24a SHA-1: 2c00f5edd59f25502c34c34d48b7c5cae99e5e0f SHA-256: 349bb4bd5008e0089b263d09f244af65c9aa0c93484266b1f5d915630a9eccba
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://ttraff.me/123?keyword=percy+jackson+chapter+2+pdf In PDF document text
    • https://tefifegewa.weebly.com/uploads/1/3/4/3/134335978/b5f229b387ad1.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/sutabu-mujoruva-wodusulude.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/pazifetanegapu/paxiwiguji.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ruwaxexawazokigesokiji.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/easy_piano_christmas_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c87a6f-a754-4573-abd3-e3dafe782f05/65021690507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b1780e-cfbf-4785-a859-3bd628655721/wujebabufududofosep.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/20371793526.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/73959717098.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/capitalismo_socialismo_y_democracia_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27621355-5c3f-4fe1-97d9-eda40f75ab2a/84616564276.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/pdf_us_mail_request_form_annual_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/deduraxabebilewiv.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_off00007389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 5588 bytes
SHA-256: 68a017847e449f3c1c759910b4c4c52b80a28b218593ba48fe9015e2242907d9
font_01_sfnt_off00008696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 10340 bytes
SHA-256: 11e38c78236e0b705ea39285099302c57e857534bca8c83720db6538b943b32c