Malicious PDF — malware analysis report

Static analysis result for SHA-256 f228065a5f22c475…

MALICIOUS

PDF

74.0 KB Created: 2021-02-24 01:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6d0c098918176bbb447d42fc4fea73fd SHA-1: e5e07d42b38b2084db5a1e0e2c855753f3c8ba7f SHA-256: f228065a5f22c4751e5cf027396852260bfd35c1252a2a6f5b2e19128cc58999
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, which is indicative of a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful sites.

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 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.
  • 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://jacksth.ru/aws?utm_term=lane+furniture+recliner+repair PDF link annotation
    • https://cdn.sqhk.co/satovepato/ggX5ihQ/covid_alert_nj.pdfIn PDF document text
    • http://dkmz3.club/what_are_the_different_types_of_research_paperscxexq.pdfIn PDF document text
    • http://kino-vezde.ru/diloworenifep0cmf.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuditifu/cwjiggf/vawimexab.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/dokokopawajoweju.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/aFiggeM/pitbull_dog_breed_origin.pdfIn PDF document text
    • http://reduslim-italy.site/el_espejo_enterrado_capitulo_10zsamn.pdfIn PDF document text
    • http://tgesheff.xyz/bangladeshi_bhawaiya_video_songe4ej5.pdfIn PDF document text
    • https://figidurilope.weebly.com/uploads/1/3/1/4/131452961/5411152.pdfIn PDF document text
    • http://bumaga.bz/47496742572v2ire.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/zopenave/23286971403.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/android_game_mod_site.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/pugaloxebogedovepalupog.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/sorarifetil.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/mavonagirizuzobix.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/60367204971.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/saffron_crocus_planting_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 4772 bytes
SHA-256: e20999941f2b952da09a5209f4d376286b495b1cb7ec95190fbd3e561efff897
font_01_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 10908 bytes
SHA-256: 34592b0dc864c4460ba1022ea95a533b6df3a0d2b7f88e185a68c1736faf5471

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