Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ef14ed364e7bf8…

MALICIOUS

PDF

74.6 KB Created: 2021-01-10 01:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e8d33a364dea4e9af695a16e32f80bc5 SHA-1: 2412b57fdb9854a4ebd2d16857c99011edfe4456 SHA-256: 40ef14ed364e7bf8c0577a46f01399fb7e0de55831c87ae74a92c9690b526669
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=guidestone+financial+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5fba081744bff.pdfIn PDF document text
    • https://site-1167978.mozfiles.com/files/1167978/36_k_binh_phap_ton_t_ebook.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/jazekowakipoxa.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/41595831868.pdfIn PDF document text
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/1437466.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/kegig-jenora-sobowew.pdfIn PDF document text
    • https://kenometiwu.weebly.com/uploads/1/3/4/3/134340836/1261967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fb99049dc761.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/6368852.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/hajdich/fobokajaditade.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/THhfhfc/56916544618.pdfIn PDF document text
    • https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/nelugo.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/duzexefemosaxe/94142969486.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/10594281313.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/27729079692.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/85259563944.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/informante_minero_cerro_verde.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_off0000e6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DD 5564 bytes
SHA-256: e509454444e8955357329f82eaf96bc2d1435c958f705248d69f05026ac6db95
font_01_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 10484 bytes
SHA-256: 993c4808f4cda4b8f9d54f9304f9b51ce14313c283f8fd32a6b6eb54ed78ac7f

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