Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c19f424ddb3ec30…

MALICIOUS

PDF

52.9 KB Created: 2020-11-06 09:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a7dc6405b44eef50c11e8fa55fe72d47 SHA-1: a362487a090a70fe8f14be71fc2f29cf4b8a7be0 SHA-256: 1c19f424ddb3ec30b5d078867f7b5d4e5486d703c9c20b24874604939619d845
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://traffine.ru/123?keyword=simmers+dho+health+science+textbook+pdf In PDF document text
    • https://misaxokur.weebly.com/uploads/1/3/4/3/134354007/9a296423620cb.pdfIn PDF document text
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/8680167.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/lalomovag_morakaw_rijiwugowax_semizifugig.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/4008283.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/xuniziwonimidojosud.pdfIn PDF document text
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/442762.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/zofisumuwebuzo-kogekovexodez-kanuxesorib-damulazuni.pdfIn PDF document text
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/rofokaxevus.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/gerujopap.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/546312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/fagawek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b277acfc-be7e-402b-b752-254a3c084941/jusexewu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 5768 bytes
SHA-256: 87a7d41a5697ef5203f5f6697faba55d4dc0528bc4f00e6996529da0ce579ec7
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 2576 bytes
SHA-256: 297f52f4236f09ba58e85c0251406db64a4d3221d73012e717b108c12409d6fb
font_02_sfnt_off00008a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 10444 bytes
SHA-256: 1fb71ef628675494e6fb04bd1777927d7635947bd41cf33246705b9762b99ca0
font_03_sfnt_off0000ae5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 16780 bytes
SHA-256: 68360d215686b7ffd363eeb0253592cf4566abf286d77cfdfbfe23f63f7602e1