Malicious PDF — malware analysis report

Static analysis result for SHA-256 caba66d10ae7fc7e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-25 09:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c61f7dcb899f2111a92c04de38f71b95 SHA-1: 935d2b24c915de40310333cc11ec47c7b63d01b7 SHA-256: caba66d10ae7fc7ec725e87ae7c0ecba1718fdd50ca01731756f271d69f237c8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to reference 'Itunes gift card code generator apk', suggesting a lure for users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of malicious links and the lure content points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://dafemum.ru/wix?keyword=itunes+gift+card+code+generator+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5fe6f027425bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_601d01dd69c4b.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/32308548338.pdfIn PDF document text
    • https://pumoguviponurin.weebly.com/uploads/1/3/4/7/134773216/zejobi.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/power_of_words_book_bts_v.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/bojesekafel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5fd8271371b56.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/2b55d9e7-924f-45ed-95ab-f89f39b8ae9d/seated_piriformis_stretch.pdfIn PDF document text
    • http://lidumadinub.epizy.com/23596250695.pdfIn PDF document text
    • http://sixuregorajaso.rf.gd/aubergine_nutritional_information.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/nizagafoxomis.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_b0d8b5e1acb94e37b0e6df243d6c5e5c.pdf?index=trueIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_6c837b05104d415f916109e5d97516e5.pdf?index=trueIn PDF document text
    • http://lajovaputap.myartsonline.com/youth_development_business_plan.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_09410f8cbdc24104bf2151753b98e617.pdf?index=trueIn PDF document text
    • http://zakuvusebaj.epizy.com/26453788441.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_7fdfa223236244a9b09b645aa81c75fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26402a7-d233-4618-b8b0-4cf22069b743/jitutitatafasozu.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_b8816c24e258404a9f98489d649ef6ed.pdf?index=trueIn PDF document text
    • http://bodagoge.epizy.com/32420865367.pdfIn PDF document text
    • http://memepev.myartsonline.com/caedmon_s_hymn.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_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5292 bytes
SHA-256: 532a1db9365a2d73b344e296467cd206ee9629855ed4d83b1543eb46d65424e3
font_01_sfnt_off0000fdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC9 11680 bytes
SHA-256: b33b9b13ff98df18ef7dbcc025788cf0caca3e0ae9121ca5c8b6074c634e2c66

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