Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d045e023facb0c…

MALICIOUS

PDF

58.6 KB Created: 2020-10-20 02:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8946eb0821334d6ce9a674b2f8fbcff4 SHA-1: 76b046fdcef80167b27c189523e53ba927519cc2 SHA-256: 33d045e023facb0c65248bc18080e8ace42296e668a389894fa5e30383dcac18
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=minion+rush+halloween+apk In PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/83c56c7.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/wewipanudutulenukow.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/9497306.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/6339450.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/4513891.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/kigimoja.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/8644811.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/risufidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f87aa5c6c90a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8727f753329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8d74da5b692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f89b2bb4b340.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/b2cd854d790610c.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/d4a67fdb8236a1.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/nazupukoloropuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4215/0844/files/39842182882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0054/8504/files/73124157846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/street_fighter_4_android_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/living_beyond_your_feelings_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5068 bytes
SHA-256: 6d01931709b38740f357d07dd7c45d8904c3a3931e7a72f49e64fa2b52338ad2
font_01_sfnt_off00007eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 10236 bytes
SHA-256: 144b2562a4a3d385e54eb62a8d327abc6aa4cb8fba37bfc797992b40a30b1fa5
font_02_sfnt_off0000a06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA06F 10420 bytes
SHA-256: f23a7cd5a9cda0a99426817b9e575d95d910c345f617bdad4c162a3a3bb48086
font_03_sfnt_off0000c44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44E 16996 bytes
SHA-256: fd43dacb4bc43a8e8e878acd53139ee9f2a11a2abad17c9ea111ba8ebeb4d0b9