Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db1113e496184ce…

MALICIOUS

PDF

48.4 KB Created: 2020-11-03 06:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c2d26cafcb16bec9e7bf1f9ad58cf29b SHA-1: 158ca31ec16ce8e142458a633a7e028899c4ad22 SHA-256: 8db1113e496184ced62a1575b0687f044d6607a518f9d56cd671a0516d7c37a6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=illinois+work+permit+forms In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5f92121aab57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f9a5fb799d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f9d54f68152a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f905f9b62499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f9e69703cdf1.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/nosulurib_kirigig.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/47292360a0.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://s3.amazonaws.com/zosevid/arpe_ponce_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/diane_arbus_photo_twins_sisters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f460d1-1b61-487a-a66d-1a7bae4accef/8._snf_matematik_olimpiyat_sorular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1386/5124/files/knjiga_opceg_znanja.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/cheryl_and_company_real_estate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/negative_numbers_worksheet_year_7.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_off00007306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 4720 bytes
SHA-256: 213d45db02fe5d96fab41271769c972b1e02603d998c2400701d6701a45e78a7
font_01_sfnt_off000082fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FD 10556 bytes
SHA-256: 6fc1953061fffcb44d167abc7e95c011eb1282bad1339a891dfcd28ab6158566
font_02_sfnt_off0000a6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378