Malicious PDF — malware analysis report

Static analysis result for SHA-256 81818ca11d7c9062…

MALICIOUS

PDF

62.9 KB Created: 2020-10-06 20:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 994a314927e6b614a6887a79e5dddb13 SHA-1: dd9874ea59fb247495bc3b25ae4850c712052072 SHA-256: 81818ca11d7c9062d60b0c17a355fd12c9c80c307c79b445870d828c356c22ef
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=remouse+standard+full+version In PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/97008690542.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/kopubovinefoburonerezimif.pdfIn PDF document text
    • https://site-1039813.mozfiles.com/files/1039813/xadusetusajolexowutin.pdfIn PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/fitutabitevo.pdfIn PDF document text
    • http://fulogi.gtmathematics.com/uploads/1/3/1/6/131606051/fekaxanosinu-xuwijegidizog-kazejejej.pdfIn PDF document text
    • http://files.digitalpds.com/uploads/1/3/1/4/131437464/72c3053b6.pdfIn PDF document text
    • http://files.ordanburdaninfo.com/uploads/1/3/2/6/132696104/kuferedeg.pdfIn PDF document text
    • http://files.ballfamilyqt.com/uploads/1/3/0/7/130739916/c9940f967.pdfIn PDF document text
    • http://tusefaboj.sjinteriordecoration.com/uploads/1/3/1/4/131407492/bonewaluwexit.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/1/0484/2409/1802/files/ritebumuwozesagesutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/20634424513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9680/2205/files/tipos_de_lubricaciones_mecanicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e6bbca-5aa0-4878-a4e5-86e7551efd92/11326310136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b028126d-68c3-4f12-9e61-cc3b14b7cffe/dogagijakodevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3842453e-d917-441d-a9cc-d9d9d86d8a52/13948675979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580f28e4-b64a-4c2e-85f0-87be5830b2c1/rumiberebi.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_off0000b805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 5120 bytes
SHA-256: 195b3786f523f86977dffa8f5cfe11d898ad51d2270aa8d20d006320696d872a
font_01_sfnt_off0000c963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC963 10904 bytes
SHA-256: bbb9c9f9d085910e9d5ef2b53de33a1b72c256ec7951fb078a8d8bed82e25926

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