Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23c46ca9b89947a…

MALICIOUS

PDF

45.3 KB Created: 2020-10-15 20:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c3492a27954a8ef87ad4782d0b4e26f0 SHA-1: f77bbbff2940ee51b268ad98d8572b43c39390b9 SHA-256: e23c46ca9b89947a29e90846395916b0aedc377ee1e8c40f2d336678773c9193
152 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/123?keyword=speakwell+english+book+gujarati+pdf+free+download In PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/jelaperumubefivowi.pdfIn PDF document text
    • https://site-1043603.mozfiles.com/files/1043603/12449891522.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/32735452623.pdfIn PDF document text
    • https://site-1044012.mozfiles.com/files/1044012/6226174997.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/80646276579.pdfIn PDF document text
    • https://site-1044209.mozfiles.com/files/1044209/laginanilumoxerekimapa.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/70470175786.pdfIn PDF document text
    • https://site-1043032.mozfiles.com/files/1043032/android_navigation_component_pass_arguments.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/9179056.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/faluji.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/zaramevasitu_zexazivofulovap_tuper.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/6dad58ab.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/jamixujumesuvudoni.pdfIn PDF document text
    • https://site-1042887.mozfiles.com/files/1042887/vilumofowefovelulusamoton.pdfIn PDF document text
    • https://site-1040339.mozfiles.com/files/1040339/23098470741.pdfIn PDF document text
    • https://site-1038412.mozfiles.com/files/1038412/665265645.pdfIn PDF document text
    • https://site-1039995.mozfiles.com/files/1039995/97244184443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f87710e31f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f870f5c8d23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f873069157c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f88035904923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f87cad980e12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 5776 bytes
SHA-256: 4e10dd9fe7a4b31396a443ae7a8eba4be60e941f3d65ce5c750e5b748ff427a7
font_01_sfnt_off000083e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 10288 bytes
SHA-256: fc4bc9e29e8ec6fe5ca71d95baa7ed4894334eae0ce3fac8007e12ed0de6fc3d