Malicious PDF — malware analysis report

Static analysis result for SHA-256 2444443e7e293ee4…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 05:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1a21f17615fb11dd3048aa5a49553431 SHA-1: eaa4ac1f8cbb1c55b74bb30974158b74297546e8 SHA-256: 2444443e7e293ee4641730c84d9fa3f7a701b7ab91b845ce9d6624ab3ed92012
184 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The file's content and structure, combined with ClamAV and ML detections, indicate a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF's nature suggests it's designed to exploit user trust by presenting itself as a relevant search result to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9629

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=carbon+fiber+production+process+pdf PDF link annotation
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/ac9e717c0e6f86.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/9132629.pdfIn PDF document text
    • https://wopufibirebosaw.weebly.com/uploads/1/3/4/4/134466277/fe87e79a8.pdfIn PDF document text
    • https://tokokurud.weebly.com/uploads/1/3/4/7/134744431/6595177.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/5676814.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/gifubakapexojare.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/remodelaz_fuwaxuj_jenimi.pdfIn PDF document text
    • https://rosavipufek.weebly.com/uploads/1/3/5/3/135315232/2128254.pdfIn PDF document text
    • http://viwimewi.22web.org/11852187180.pdfIn PDF document text
    • http://jonedukemexet.22web.org/what_chinese_takeaway_dishes_are_gluten_free.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/xabalaru/ziselikukanim.pdfIn PDF document text
    • http://zozefopufudamow.rf.gd/mathematical_analysis_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/64877987212.pdfIn PDF document text
    • http://pomigipasa.epizy.com/asphalt_nitro_android_oyun_club_para_hilesi.pdfIn PDF document text
    • http://rurubafemiw.rf.gd/iphone_ios_11._4_quartzcontext.pdfIn PDF document text
    • http://doluxefewofelex.epizy.com/9408691137.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/data_analytics_certification_google.pdfIn PDF document text
    • http://tejogasev.rf.gd/honda_5000_generator_used_price.pdfIn PDF document text
    • http://tawaxinazaka.rf.gd/autocad_border_off.pdfIn 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_off00011362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 5160 bytes
SHA-256: 004c210afb61a29d39ba43fa69e46c3ad1425bee352147c33c7735ebffef1224
font_01_sfnt_off000124f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F6 12260 bytes
SHA-256: 8054d3c075f5be6d24caddd0ad1e2f8f9ce5abaa9cc7602ab42d08a87183448a

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