Malicious PDF — malware analysis report

Static analysis result for SHA-256 91631b789b7c9c8b…

MALICIOUS

PDF

72.5 KB Created: 2020-10-23 09:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: df903195c3a76403197c78dc0237cd42 SHA-1: 450e48c41f00da5e68d2b5724b8706747d9e327c SHA-256: 91631b789b7c9c8b605eddfe2e829094e8cd6229104ab12b113d463819e9c63f
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://ttraff.me/pify?keyword=photogrid+premium+plan+apk In PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/2422682.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/zavuvuvinigawowu.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/mowitulagaxi.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/lozeneri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f90cd4f82073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f8b57123f911.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/dc50df60182.pdfIn PDF document text
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/furazumom-zeweputoxowif-wukesorox.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/5355122.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1667b314-314a-4cf3-b330-41718792fbef/zasixixakos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edc385a-f4ed-42e2-9d6b-756338f3067b/82363870558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8734a6-5ca1-41cf-9290-8c3aac0429d6/katyusha_mp3_skachat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8ca7f6-b2eb-42e4-8857-a47f5e29f70e/nuxamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fd34f6-7d15-49fd-86f1-b5cf439d7b70/buwizopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3325/9943/files/myth_of_sisyphus_camus_read_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/98688107602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/63218989713.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F16 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off0000af90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF90 5260 bytes
SHA-256: fa2d1483952555904d744418ab77fadcdee6423677ab124ebd8c520de1e4c06b
font_02_sfnt_off0000c14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14A 6012 bytes
SHA-256: 4afb03a668944d1655254819281efa2ab6413e38701a2538f463b6e28900cd45
font_03_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 11616 bytes
SHA-256: c72b830efc9e6ba444f1483fccf496b37e1fff44ab10fccdae3fe272d598b260
font_04_sfnt_off0000fe81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE81 16128 bytes
SHA-256: 5570ae8fa562a837499aa87710aed0b2bc48f7e42481059dc68e183d0697d456