Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5503693dfc71c9…

MALICIOUS

PDF

58.6 KB Created: 2020-12-14 19:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 575e7b9e7ccf921675bbb9fb8971b116 SHA-1: 1a93334ac47d2851efd8925c9f69d547a17569d7 SHA-256: 5a5503693dfc71c99d558b658d8aaa45f9b76d21f2f5cdd408f4d43990aa5b8b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to search terms. The presence of multiple PDF links suggests an attempt to drive traffic to various external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/strik?utm_term=ionic+bonds+gizmo+answer+key+pdf In PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/3251698.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/lulowoguvodive-numozimekop-litoku-zipijedatopib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f93285b1db0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79d879849b27a00a77670/t/5fcbd4f436758319a55de0f3/1607193845033/63495877260.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5af5f12facd59cecdbb78/t/5fd70b76ffab5d3c5611a127/1607928699172/zirikat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba41017e-4417-426f-8e39-8a816e2914bc/trusty_lady_and_the_tramp_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fce04c-a8b5-4e46-9682-c32d95a9faa6/63810814400.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/silibux.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/mukejolal.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/adobe_audition_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/bemeg.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/mitoji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe32af9d79364840592092/1606300336681/12912547674.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_off0000ab70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB70 5828 bytes
SHA-256: 55b50128d2c4b42ce861e217a879b092c738dedc87a453dc8366cbfd03033191
font_01_sfnt_off0000bf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4E 8916 bytes
SHA-256: 2fb34fc0f9c48b8a51da523e24f6084cb8b412350aa5d9cb4e660ced7ad4de95

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