Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7111a85372f362f…

MALICIOUS

PDF

50.4 KB Created: 2020-10-27 19:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 543af0981b3a1cded1f1359dc0d5c7f4 SHA-1: ba5c45527de9190f0d42e6882bc93e8733501fc7 SHA-256: c7111a85372f362f20c21a43f6cd504a76275c4c61d220fdab4c156ff7682e6b
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=algebra+1+regents+august+2017+answers+part+2 In PDF document text
    • https://munerotilaxamo.weebly.com/uploads/1/3/4/4/134476206/mabasisinomiwene.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/sojobefil.pdfIn PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/lowux.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/8816404.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/7393568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f94a0688d324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f8ea4a777277.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/f3863fc95c.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7433093.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/5bfb5d7f71811.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/wusone/66072886113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/minevataniworodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/mirror_photo_apk_for_android_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/46407444526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7206/files/16932131035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/cours_sur_la_nomenclature_des_alcanes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ab99f6-ce39-47ac-adef-407b66f6132d/wavofawawugopuborusetup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba4daee-a745-4635-971b-8ea63d6c2d6d/viridolagazeratitanem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e161cd7-7c2f-4f90-bd3d-e9e68b1fedd6/27684522079.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_off0000746b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 5336 bytes
SHA-256: cc86c894b0af582a440bb01f4e6c98cbb7f6dc1cb8324110794180151ed3f8cc
font_01_sfnt_off000086b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 11740 bytes
SHA-256: 4c3c8d0de99cf2fce23f0eae2c59c87a959abc0b3a7864a7896572616af56348
font_02_sfnt_off0000ae20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE20 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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