Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8e98b49e9b5c1b…

MALICIOUS

PDF

42.9 KB Created: 2020-10-28 17:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f1d7fee7aa72f1da55a5caefd268edb1 SHA-1: c50688707c5498094c7748c94ea197f1a11ec324 SHA-256: 5d8e98b49e9b5c1bcb5508500eaf3fceaee824c13de277f21637d8e58acafa18
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=bed+and+breakfast+santa+barbara+wine+country In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f92adbe7e114.pdfIn PDF document text
    • https://pozitolize.weebly.com/uploads/1/3/4/3/134330731/5452816.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/disurugajomubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f97cef7a28ea.pdfIn PDF document text
    • https://juzugimigiroteg.weebly.com/uploads/1/3/2/3/132302883/05478bdc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f95dec3a4125.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000067f7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000067f7.bin)
    • https://s3.amazonaws.com/wonoti/imden_bluetooth_fm_transmitter_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d4717e-3298-47ae-871d-4c1b9a24c46e/43502225213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1305f4-b05b-4aab-b388-6ab7409c3058/97487455940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8b30bd-772a-4592-9a4a-e94aaea6f0f2/20954988245.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/babosaraxigifofolodekuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbfbba38-8ac4-47dd-a782-228480a6b198/rizoguwokaronatutid.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/burilojigidet.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/cours_android_studio_openclassroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b7b438-9756-4e66-81f6-b5bc21239bca/43610345581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9c8b3c-7dfb-4617-bd47-82d5f5571c08/everything_is_awesome_lego_song_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb40ab8-3f9f-42e3-b34f-3bfb92ccfa5c/35326527908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b7178f-44d9-42cb-9dda-7966351ed84e/fuwegi.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/ascanio_in_alba_mozart.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 extracted file (font_00_sfnt_off000067f7.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 5432 bytes
SHA-256: a11288bf52a2bbe8a5c61eb87220bd468d0e76d210c1487e6b9b3f126726b5e5
font_01_sfnt_off00007aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 10568 bytes
SHA-256: 1eff6c359ddff6435709bbe49d10ce2cacdaee18b1cea709d6c33720dfdea9ae