Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea741cc98459e00…

MALICIOUS

PDF

75.9 KB Created: 2021-05-30 04:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d3a090ec213d71839da58783e6cc27fd SHA-1: ec9616722e621ebc7eb372db074c7e3d2d8d9de1 SHA-256: dea741cc98459e0052e457ced51e14863b2c4c15516500f9e8d537e3ae4a93a6
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's used to redirect users to potentially harmful sites, possibly leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=what+episode+does+marinette+find+out+who+cat+noir+is PDF link annotation
    • https://gitapobukelagij.weebly.com/uploads/1/3/4/2/134266265/6015517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_606a247e23e74.pdfIn PDF document text
    • https://bokonuso.weebly.com/uploads/1/3/4/6/134604328/af18f32227809.pdfIn PDF document text
    • https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/c7965.pdfIn PDF document text
    • https://lujogome.weebly.com/uploads/1/3/4/6/134617312/ledug-wewalisumax.pdfIn PDF document text
    • https://moxujudafetofa.weebly.com/uploads/1/3/2/7/132712376/wajojisidiropokik.pdfIn PDF document text
    • https://ruwofemenir.weebly.com/uploads/1/3/4/0/134040866/fusufexeboxa.pdfIn PDF document text
    • https://topitodowel.weebly.com/uploads/1/3/4/8/134890479/8644397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_5fd33e68c5b09.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/rovoso_wuxinaxuw_devoxe.pdfIn PDF document text
    • https://rulukipa.weebly.com/uploads/1/3/4/3/134329123/506486.pdfIn PDF document text
    • https://zodijezuworid.weebly.com/uploads/1/3/1/4/131483265/1d1670.pdfIn PDF document text
    • https://rifitozimolumi.weebly.com/uploads/1/3/4/6/134667823/3264832.pdfIn PDF document text
    • https://betiriwusogaz.weebly.com/uploads/1/3/1/3/131380032/faninozefup-weniz.pdfIn PDF document text
    • https://rakuwogu.weebly.com/uploads/1/3/4/8/134858672/madumelaseso.pdfIn PDF document text
    • https://bomevalaruzaf.weebly.com/uploads/1/3/4/8/134871705/2a801dd75242.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/dapig.pdfIn PDF document text
    • https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/badipar_kutojeju_megekenat_subukuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_60180d7d7382e.pdfIn PDF document text
    • https://balalowomave.weebly.com/uploads/1/3/0/7/130738893/xinuwo-nabonitujedura-bigevej.pdfIn PDF document text
    • https://depuxibuf.weebly.com/uploads/1/3/4/7/134762413/11e7c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 5468 bytes
SHA-256: 4ea59debc841f55e8f4fb535535e771e1be9a3c4a6dec5ac8d00fd0ec6e2a58a
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 10960 bytes
SHA-256: 60004bc35869833d21d0002863ffe61b4b8e9fc6dac172e25afe578fe0c40544