Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c43a67cd9249d4b…

MALICIOUS

PDF

41.5 KB Created: 2020-10-25 01:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: cd2349529823f8a77c4edb7f0c4c35fb SHA-1: 1e85cca1fad6761dd05e87eb17bf50e8ec11fc66 SHA-256: 4c43a67cd9249d4b23836de3844162503b438b0f364629e874594927f8620ee0
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://ggtraff.ru/strik?keyword=funcion+parte+entera+ejercicios+resueltos+pdf In PDF document text
    • https://kebudojud.weebly.com/uploads/1/3/4/4/134400915/c4a34.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fapomageso_pinitorup_foberol.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/1837919.pdfIn PDF document text
    • https://vanawolibonute.weebly.com/uploads/1/3/4/3/134344109/mepamisazonepirebasa.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/masot.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/lejif.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/6954211.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/5718860.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/f4cd92492c37.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/lupexi-pekuwemiv.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/1/0486/3456/0670/files/philips_xxl_air_fryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/word_formation_list_cambridge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0293/5477/files/93241870553.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/zalurezurimikivaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/hillbilly_elegy_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/marketing_definition_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/statistical_learning_with_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1883/8435/files/genetics_vocabulary_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8486/6236/files/40787221799.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBB 5180 bytes
SHA-256: fc3e522fae0880dad41cb180fa9d4c4e8351a4a20fb687f66e68d4ddaf5c9f19
font_01_sfnt_off00005e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 10400 bytes
SHA-256: 905a76e43e6e9fb018c1264d3deceebbb6bd07467779a197fb76a6a3db70cc5f
font_02_sfnt_off000080af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 16356 bytes
SHA-256: 279782b4bd3a8d21a5a468c97eca20174b9c3be5b8ca1cb73b19143ce45952bb

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