Malicious PDF — malware analysis report

Static analysis result for SHA-256 8045c89f7302cb3c…

MALICIOUS

PDF

59.4 KB Created: 2020-11-04 22:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 117544e4ace0eb2dc663e4ec9a9f315e SHA-1: 3af6e710cd904aaf3b590eaa55d9d978fe4d18b5 SHA-256: 8045c89f7302cb3c60e5a1bb8f64c28b6c8425bac599bbfec4df555657225fe1
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://ttraff.me/123?keyword=a+man+called+ove+online+reading In PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/604417.pdfIn PDF document text
    • https://roneresikixa.weebly.com/uploads/1/3/4/4/134476702/3d90441ec53d1c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5fa11e134d637.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/mufizunig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8c4f79143b8.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/ziluwo.pdfIn PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/e8e0aff03c1b750.pdfIn PDF document text
    • https://durezeneb.weebly.com/uploads/1/3/4/2/134235042/0afe3538cde5.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/5128955.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://roxunasof.weebly.com/uploads/1/3/4/3/134312726/ruwokavamejokal-bepowenepoji.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/zerotikenobupu-vofis-zijubixik-sabadodi.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/ea7e2eb3-3873-4d19-aeca-28e0ac5643b1/3292367568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b1b08b-b2dc-40b1-8cae-b8ff2eb96f64/praxis_5001_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae6cf05-82be-4fb7-9d20-c8f8095709d9/1921235041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b32fbf-8d49-4f77-a6d1-ae79c26b25c7/10557822677.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_off0000ab37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB37 5132 bytes
SHA-256: 8a4fc46126234f6e90cbd3bc4d98b7c37fc18de295a0459293f19ca91d16efd7
font_01_sfnt_off0000bc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC94 10504 bytes
SHA-256: 93df12c004e84a6a7a372e1e43c4584d82587abffc9370c76caf88282234ad53

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