Malicious PDF — malware analysis report

Static analysis result for SHA-256 7515ffcbc950209b…

MALICIOUS

PDF

71.9 KB Created: 2021-02-06 01:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f70ac3c55317cc4437787490c7636d10 SHA-1: b3bce0fe005ad72852ba1893f07aed6c9f56a2a0 SHA-256: 7515ffcbc950209bee855dbd655ea89c64fcd02e45bf9ed6ded6dd827a0bcbc3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous external URLs suggest the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate these redirects.

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
  • 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://bologen.ru/aws?utm_term=demand+driven+material+requirements+planning%2528+ddmrp+pdf PDF link annotation
    • http://tixshopclub.fun/witenefulaxavavdgewu.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/vengeful_spirit_horus_heresyzxrxv.pdfIn PDF document text
    • http://toxedajenoxin.66ghz.com/47978469939.pdfIn PDF document text
    • http://fevozogu.iblogger.org/examiner_report_edexcel.pdfIn PDF document text
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/3877096.pdfIn PDF document text
    • http://sellamorem.com/easy_nail_art_designs_at_home_without_toolsndsdh.pdfIn PDF document text
    • http://perevod24-card2card.site/sms_messages_app_ipadoocyn.pdfIn PDF document text
    • https://digigabatafer.weebly.com/uploads/1/3/5/9/135995708/ropigesopodume-dugariw-fuwuxile-nenizanuxu.pdfIn PDF document text
    • http://frukt.space/nuxagijolaligubomidepojiylf23.pdfIn PDF document text
    • https://fozaxuvuten.weebly.com/uploads/1/3/3/9/133986835/kumipadaj.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/9784083.pdfIn PDF document text
    • http://changepass.online/moksha_en_el_hinduismoxccjv.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/jifibu-sajane-gasutebumotik-rumaxagij.pdfIn PDF document text
    • http://picsonair.com/baixar_hack_de_trsorerie_para_clubmmc6c.pdfIn PDF document text
    • http://fakts.design/79620825171k3d36.pdfIn PDF document text
    • http://idealslim-ordina.site/lejuvodafajizivp3sb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevusajilitum.rf.gd/buffer_solutions_problems_and_solutions.pdfIn PDF document text
    • http://sogisujomixugo.epizy.com/zumixizesufepedekuragigig.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_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 5624 bytes
SHA-256: 19b711b4c4b2f586c170327f05d678c12fa15e6d1c74c19119b09066d3f9966b
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 10732 bytes
SHA-256: af4a576d3ec4ee7e6570a004fb400dd4791f1077ea0d6dbba097de74a72af7d1

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