Malicious PDF — malware analysis report

Static analysis result for SHA-256 310f471f267ead99…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 01:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 91f3f42620b96de9b773c19380a6e61c SHA-1: 069d3f4866acbf147fd3dd5719f735ec8e76aa9e SHA-256: 310f471f267ead99c719a3246f4371917e1788aae0ff9e48b5b3554ea64a8538
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a site offering a 'euro truck simulator 2 money guide'. This, combined with heuristic firings indicating a link farm on disposable hosting and a high ML score, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent.

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://jottigo.ru/wix?keyword=euro+truck+simulator+2+money+guide PDF link annotation
    • https://cdn.sqhk.co/sovokeduseb/xm5gjjb/name_generator_wheel_spinner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5ff88dd07cf3a.pdfIn PDF document text
    • http://wilemavilaka.22web.org/62898307867.pdfIn PDF document text
    • https://wepuporo.weebly.com/uploads/1/3/2/7/132741302/25cf8a9a266.pdfIn PDF document text
    • https://ninujesifig.weebly.com/uploads/1/3/1/4/131453022/7825438.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/67602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_601b314e5dc65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5fd64f90ad9a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370740/normal_5ffe50a796758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demujub.rf.gd/39613393943.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/69053270668.pdfIn PDF document text
    • http://velawomonoxejuz.epizy.com/cavelli_bed_sheets_singapore.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/booklet_template_pages.pdfIn PDF document text
    • http://vibakiwijikilok.rf.gd/80511780096.pdfIn PDF document text
    • http://favuzokusom.rf.gd/68779992856.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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 5512 bytes
SHA-256: 75e83d4c9f437749c76106d12c51deb590f326907b127a11f698088a2195b7f0
font_01_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 10084 bytes
SHA-256: 7196a7f41840687e521edf422a88a5a77bdd60825bd201ec3042a95dab58982f

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