Malicious PDF — malware analysis report

Static analysis result for SHA-256 2646221c2632c006…

MALICIOUS

PDF

75.3 KB Created: 2021-05-02 10:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 15c4b6bccd551d3f4161cf38511b47b2 SHA-1: 71f920e43e6f1a1f8518ac0f1b772c288018d60e SHA-256: 2646221c2632c00660518a35a70b9fd03954651595f7d74c3e526acc3549caff
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://jumiwimov.ru/strik?utm_term=how+to+resolve+conflict+in+healthcare+setting PDF link annotation
    • https://mupezoki.weebly.com/uploads/1/3/0/7/130739180/1986519.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/cBheigv/se_wheelie_bike_seat.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/blZgeig/17221075736.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/jgdT0MX/gobulorisizofoxalolaj.pdfIn PDF document text
    • https://devejibotabakap.weebly.com/uploads/1/3/4/7/134702496/9743512.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/67142649757.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/jiibUXE/google_drive_apk_for_kitkat.pdfIn PDF document text
    • http://jexurumefatomig.22web.org/xiseziton.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/88agfgc/break_time_images_coffee.pdfIn PDF document text
    • http://jabalok.iblogger.org/hakikat_manusia_sebagai_makhluk_alamiah_dan_sosial.pdfIn PDF document text
    • https://vapotilixivurok.weebly.com/uploads/1/3/0/8/130814345/7672456.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/a9b1e7b6077e15.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/iehibgj/88767582728.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pewesinelukaveb.epizy.com/cdc_influenza_vaccination_information_sheet.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/anti_terrorism_act_2020_pakistan.pdfIn PDF document text
    • http://webidiwotew.epizy.com/vakorazigomeno.pdfIn PDF document text
    • http://wufejupixixot.epizy.com/alta_fidelidade_livro_download.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/what_does_lf_mean_on_maytag_bravos_xl_washer.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/welinaredaxivajedatomiti.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_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 5256 bytes
SHA-256: d79fb64a573e09241288c89fd41ecd18765f27f183e089d250801a0404d10259
font_01_sfnt_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 10864 bytes
SHA-256: 1d811fc241886f1f127e2df8fc9ebade3221de70d030c2a93ccbd2dc58d0c03b

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