Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4676fa393a5dc6e…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 01:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b2882a75751ba754b7a3b69537b300e5 SHA-1: 026e6c26d1f10a49a47f20f5ab509c75698e41a9 SHA-256: f4676fa393a5dc6e4873130399e665cdfcda9db1dc2e742f8eda0abc9ad72375
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and redirector infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

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 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://dafemum.ru/wix?keyword=science+lab+equipment+worksheet In PDF document text
    • https://cdn.sqhk.co/simikitivo/ujfQHzR/juegos_de_farm_clash_3d_y8.pdfIn PDF document text
    • http://xivetaf.22web.org/dominating_sword_immortal_epub.pdfIn PDF document text
    • https://cdn.sqhk.co/dikabopagesi/jeriagc/scenery_coloring_pages_for_adults_online.pdfIn PDF document text
    • http://temulisufijib.22web.org/how_much_is_a_brownie_camera_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/bezedono/SgihjEL/26600920785.pdfIn PDF document text
    • http://pefujogori.iblogger.org/website_template_html_css_free.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/hagfQnR/17285713157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372105/normal_5ff17cf95e564.pdfIn PDF document text
    • https://cdn.sqhk.co/xelimibela/9UrREja/28514382087.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/SwjfQih/90946337126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_602c9001d356d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5ff6762673abd.pdfIn PDF document text
    • http://wirajamosilun.22web.org/29832581744.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/woberiz/37424387118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856505be-f50c-4bf9-ab75-9263146715dc/eragon_full_movie_free_download_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/google_authenticator_en_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559ec680-4472-4f46-85ff-0cc2ddbc5992/the_count_of_monte_cristo_movie_2002_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d06776-4155-4c20-9e56-14e0e972543f/the_count_of_monte_cristo_free_ebook_download.pdfIn PDF document text
    • http://wefijusadoveva.epizy.com/how_to_use_a_trilogy_ventilator.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_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 5700 bytes
SHA-256: c6b96bcadd83399f9b3fa318df5bc9757e48e5c8610292ee6575d0df30a224d7
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 10836 bytes
SHA-256: b27adbfb67966f86614af465c2d59481ca6b3710e37a6caf64c67f99a72f8fe2

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