Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12374fdd7535eb3…

MALICIOUS

PDF

41.1 KB Created: 2020-11-02 06:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d330da551e9493c6d28e40232f42b0ad SHA-1: 4e73a4c2d2fd47ece3d1716167e95072ebd14c5b SHA-256: b12374fdd7535eb3c1d153bf090a45d1a1d26ea452a5a9d6d4a54e94cd008d57
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=desmume+android+apk In PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/1517423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_5f9e5d3980b8e.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/1657575.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/c30f4.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/tijapefu_disipuxofibexe_narogadekuvi_jinurakodi.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/1/0507/4914/5263/files/ps4_mouse_and_keyboard_adapter_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8103/2614/files/7260878556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad68efe-639d-45c9-9d76-05d4cc4cfc67/5506201878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad68332-8479-40ad-8839-6d6630bec01f/rekinazel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8142/5585/files/sistema_de_produccion_justo_a_tiempo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0926/1735/files/44995440445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa62276-cb9c-40d1-ba31-8919454bfb52/6073681555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4466b536-c62e-4b37-be7a-44a4dce6b65c/lettre_cursiva_dheureux_nol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9279/3238/files/neonatal_infant_pain_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4e0bc7-950e-4f41-8067-a3c9a92310cf/sazowuwimoxe.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_off00006386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5136 bytes
SHA-256: e2515dd968704e55084c4f6ad93371d78497308080270b3097f1036001c87961
font_01_sfnt_off000074e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 10192 bytes
SHA-256: 2f062c7e9c98afb46eb81b25df0c9978a7160747b3df6e57147faa583754a527