Malicious PDF — malware analysis report

Static analysis result for SHA-256 4880d4081927ed49…

MALICIOUS

PDF

73.9 KB Created: 2021-02-26 09:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9ff5dfaa2984f7b0c95e83d884b9814b SHA-1: ed4a08bd4e3e090b57df950ea5b256dd4401ae0e SHA-256: 4880d4081927ed49515e761be9cd55261a5677a21d63ccf4987c43d9365ee015
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/wix?keyword=ezorb+calcium+walmart PDF link annotation
    • http://frontend-developer-azaynullin.site/bluejackets_manual_18th_edition9ojgf.pdfIn PDF document text
    • http://setofexperience.site/medicaid_doctors_in_standish_michigan3q1zn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffbb29a01373.pdfIn PDF document text
    • http://geleostone.online/lanafojajanijises3kf1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_602bb0652d6eb.pdfIn PDF document text
    • http://help-verification.com/140266074862amo0.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/52b801617bba27.pdfIn PDF document text
    • https://fazafunapogaz.weebly.com/uploads/1/3/4/1/134131986/8695552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_601495e01b1d4.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/sazomo/standard_grievance_procedure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/cambridge_dictionary_english_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/employment_contract_template_word_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/english_to_bengali_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/48066636652.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/lagutexurobe.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/why_knot_sailing.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_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 5008 bytes
SHA-256: ef8e594014fd3a132c4b1b02df7f5d690d4850d80ae558f2963a536c0c5635d0
font_01_sfnt_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 10932 bytes
SHA-256: 0109f609a3ba130c9f235c8051cd7abc1611018e68ccab6d4ddbfab0f37f1e83

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