Malicious PDF — malware analysis report

Static analysis result for SHA-256 af84b6433fb81b86…

MALICIOUS

PDF

40.8 KB Created: 2020-10-05 18:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 311ca6ec59263c03aec92a535c928408 SHA-1: e6c11be49645da4791bd84700cb9658c028c0ab2 SHA-256: af84b6433fb81b863d296c9ca6f733576e637e9a439d889ea4446a6d0c7c4d97
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/strik?keyword=skam+temporada+2+sub+espa%25C3%25B1ol In PDF document text
    • http://files.discipleskitchen.org/uploads/1/3/2/6/132683088/78815.pdfIn PDF document text
    • http://luriki.sparkvibranthealth.com/uploads/1/3/1/6/131637027/4679483.pdfIn PDF document text
    • http://vevapi.anna-abraham.com/uploads/1/3/1/8/131856539/dafiwevirixo.pdfIn PDF document text
    • http://senubo.prolyticsconsulting.com/uploads/1/3/1/4/131406710/ee1d2.pdfIn PDF document text
    • http://files.tridoshayogayyc.com/uploads/1/3/0/9/130969878/kativogosojad.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/popik.pdfIn PDF document text
    • https://site-1038505.mozfiles.com/files/1038505/59906409266.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/28137589917.pdfIn PDF document text
    • https://site-1039675.mozfiles.com/files/1039675/letunipop.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/1/0430/0803/2922/files/zenil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/wotobixog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/78892504804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/37407077630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/baby_female_crowntail_betta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4732/9698/files/propane_space_heaters_lowes.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_off0000495a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495A 5756 bytes
SHA-256: 0443dcb54ea594d2df8794f33f675af6a9a3e2c6de77152f13f3bb5efd3e73e1
font_01_sfnt_off00005c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8F 9948 bytes
SHA-256: 2855f2efc577297d3a49a12857fa9f8b80b48efad17d3361ecd9ecc8fa073d88
font_02_sfnt_off00007e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 16204 bytes
SHA-256: 83b0f3ed90e545d6d36d14a1982d3fe7024877db6cf476e622725167f7eecf28

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