Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86947785838659c…

MALICIOUS

PDF

67.1 KB Created: 2021-02-12 12:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: c91eddd614e512753630252d928b02e3 SHA-1: bd32b21c8e50137aec4bde81a6ef6fc041f42422 SHA-256: f86947785838659cca7006dbfbf70a4aec878a49eb0bcb6a499ea9b001d2c054
194 Risk Score

Malware Insights

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

This PDF file contains multiple invisible links, two of which point to known malicious redirectors and CAPTCHA-themed lures. The primary malicious URL identified is 'https://yafferge.ru/123?utm_term=what+to+feed+bees+in+august'. The presence of these links and the ML classifier's high confidence score indicate a phishing or malware distribution 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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://yafferge.ru/123?utm_term=what+to+feed+bees+in+august In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_600b72f73a969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5ff85575cf219.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/urjdqXa/toca_life_world_farmhouse.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/icidjdI/sputnik_1_launch.pdfIn PDF document text
    • https://cdn.sqhk.co/popenewosaso/ghglKTU/daily_sale_inc_pompano_beach_fl_33064.pdfIn PDF document text
    • https://cdn.sqhk.co/dufadafakuti/arwjgjh/vewewesemuwatorubidebima.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/R61hcOy/pandora_love_heart_ring_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/FYIjjKE/70619026014.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/d9HCgj3/synthesia_free_version_limitations.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/faOgckR/doomer_boomer_definition.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/vovuzize/76270099924.pdfIn PDF document text
    • http://notijopozij.epizy.com/maths_questions_and_answers_year_10.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/bhilwara_rajasthan_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/77096284420.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/6677590316.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/captcha_entry_app_for_android.pdfIn PDF document text
    • http://kabemetuva.rf.gd/19428691102.pdfIn PDF document text
    • http://nifibomagogov.rf.gd/28415942113.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_off0000cccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 5192 bytes
SHA-256: f43d612d8a85c0680fcbbcfe8e826fe7790453a2ee8b10b2cd228af4f87023a4
font_01_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 9620 bytes
SHA-256: 7c7c60fc7d26a2cdac966484d4bb53435948c84a943b3f6472da55811509366e

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