Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf38fc8c82b60bcb…

MALICIOUS

PDF

83.8 KB Created: 2021-02-28 05:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5f99785dd59a81c58373d9328a1c518b SHA-1: ac8d30a583c5affea214f85ec6e3d33385ecb70f SHA-256: cf38fc8c82b60bcb344215e4a9bc56282c9d3b25bfed3277964cc980920c1127
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a PDF link farm. The document contains numerous embedded URLs, many of which point to potentially malicious or spam-related domains. The primary attack pattern observed is the use of a link farm to direct users to external sites, likely for phishing or SEO spam. No scripts were extracted, but the presence of numerous links suggests a watering hole or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=uppababy+vista+configurations+with+toddler+seat In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369797/normal_5feb94834498d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff548c063972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403954/normal_5fe27c3cca64a.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/53189939477.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/eb6c88bf9aca.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/8407065582.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/ickyiha/pase_elite_free_fire_diciembre_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_5fd0d507d7e75.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/lotos_lt5000d_plasma_cutter_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_60334fcc71f46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fe509662a439.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/Gjgchjt/10082200820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuwizigev.rf.gd/zitapapubomatadamuk.pdfIn PDF document text
    • http://sevetise.rf.gd/how_many_appliances_can_a_5_500_watt_generator_run.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/demezinojaturafabu.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/85410590404.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 5780 bytes
SHA-256: df2e8f235911785694b3722b44b56d73e20cfa57331025da29aeae1acfa18440
font_01_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 5804 bytes
SHA-256: 8253e35aa6a998d16b06106a3b5808567020e13265cf96909425ca7356055542
font_02_sfnt_off00011b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B22 11172 bytes
SHA-256: 8ecec0c797ddce5485121277610f435b7b0bd6732ff9c5690d1f54251db1236d

Open this report in the interactive analyzer, or submit your own file for analysis.