Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c19a1569cec6f9…

MALICIOUS

PDF

39.4 KB Created: 2020-10-25 23:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 04b5b96edb1fa2044ce96fdd13853dd7 SHA-1: 7a40d9cab7c8092ad23b2be2ee53842a85e7d6ef SHA-256: 89c19a1569cec6f94787dc5d672dddab880ac8278b8c27f5026aca3e0e8bd28a
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://cctraff.ru/aws?keyword=robert+sedgewick+algorithms+c+pdf In PDF document text
    • https://gituwere.weebly.com/uploads/1/3/0/7/130740556/1562145.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/36fc94ff1967.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/93a3639e03e77c9.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/9427574.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fezepi.pdfIn PDF document text
    • https://vemifibu.weebly.com/uploads/1/3/4/3/134354414/f23054544.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/734336.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/493f9f52b2.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/766de00ff9765.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000059d0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000059d0.bin)
    • https://uploads.strikinglycdn.com/files/c967763b-2493-493e-80de-c0bdc3ff06cf/zamubizapirofixinenadaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bbfa86-01bf-4b4a-94e6-9fc5fcfeb5c4/nereperorulunobes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3047/7472/files/graphing_linear_equations_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/25634941157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9199/9926/files/do_supreme_court_cases_need_to_be_italicized.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/gikufasojuxur.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/62111233554.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/49134341778.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/55233741515.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 extracted file (font_00_sfnt_off000059d0.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D0 5872 bytes
SHA-256: e93f403dc281a19b780ad2d2d9be54911d771d71461a1f1cc34448eb2a87d482
font_01_sfnt_off00006dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 10220 bytes
SHA-256: f3405d50db8637d5eae6a225107c758111a3e8ca7db8d38cef244edbed2d28ba

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