Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99e2a69d6f9a591…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 08:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 03ec979b468c65eaa6c599098e3f210e SHA-1: 321668ec4befa5eabb74a90134e809683b34147e SHA-256: c99e2a69d6f9a591d254f58591b2c66ece30b882bd6b0d870c0c43ba11f18784
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?keyword=boxhead+2+player+unblocked+games+funblocked In PDF document text
    • https://nirotobilimob.weebly.com/uploads/1/3/4/4/134484477/zisumagajukix_tezuw_gowituzu_jereve.pdfIn PDF document text
    • https://vufizebogizej.weebly.com/uploads/1/3/4/6/134601336/15d38f24dc.pdfIn PDF document text
    • https://tiferivirukituk.weebly.com/uploads/1/3/4/4/134433041/womujoxadewu.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/gegutapapevageg.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/reduzinud.pdfIn PDF document text
    • https://rikutokamalaru.weebly.com/uploads/1/3/4/3/134319242/6e4f485.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/majimared_ketafonuvuk_pepota.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/de102e1b-a203-4e24-a607-48d24e4a2554/a_bluestocking_guide_to_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/apache_nifi_for_dummies_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/23716577486.pdfIn PDF document text
    • https://zilexir.files.wordpress.com/2020/11/nepite.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_off00005ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECE 6124 bytes
SHA-256: 9824c3a2b03cf6f34a04a900017b231e962b327b67589a05c1e52aeec704fccd
font_01_sfnt_off00007389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 12108 bytes
SHA-256: 3b51aa59fa4c5457a8e4a77b266697835c6b09def021b58d967e02fdb365f061