Malicious PDF — malware analysis report

Static analysis result for SHA-256 534f36effa8fa547…

MALICIOUS

PDF

79.6 KB Created: 2021-03-08 20:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 75659c3d6d8777dba0483cdde9ea0929 SHA-1: f379ddfabb7ce060f2ed45f86f7a38c8e1ed3eea SHA-256: 534f36effa8fa547c56b0249df083f2aa1d9c24c27cfa4732591c854a2e20006
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirectors, indicative of a link farm used for phishing or malware distribution. The primary lure appears to be related to Facebook profile privacy, directing users to a malicious URL. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+find+out+who+shared+your+profile+picture+on+facebook In PDF document text
    • http://therarbooks.com/accra_technical_university_mature_formscuogc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_602816046dd50.pdfIn PDF document text
    • https://bujajegufo.weebly.com/uploads/1/3/4/1/134108800/mejeguxitex-fejena.pdfIn PDF document text
    • https://nosirulewefew.weebly.com/uploads/1/3/4/2/134236253/vemiged.pdfIn PDF document text
    • http://yandex-dostav.ru/ponadogakukyhg4r.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/zevaputosojiw.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/213a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_601d29a555b29.pdfIn PDF document text
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/8586835.pdfIn PDF document text
    • https://pigasuranebuja.weebly.com/uploads/1/3/4/4/134459694/a2da359138.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/lelil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_6045d74860271.pdfIn PDF document text
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/5481242.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/kozevab7gef1.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/eedd0f03ad0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_6026e7cecad03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_f818d578e4584aa68c356ae14dc51ac9.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_4b54518cd9324dfc8a01589ff97d46f0.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_62c6aa1af418441186a0d0767e5dd0a5.pdf?index=trueIn PDF document text
    • https://dc3b6686-5ec8-4f9e-b140-4b8929053b40.filesusr.com/ugd/94e5ef_4d6f614bbf7b40bbb304dc287e5a8989.pdf?index=trueIn 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_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 5600 bytes
SHA-256: ce7668aade3f6802d8be6e62c3d08377bdc15f32175af2a62d177b76eb82ec41
font_01_sfnt_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 10996 bytes
SHA-256: b4febede08eb688beda3caf2038ad8209ed1808b1e271fe604d13cadd3758802