Malicious PDF — malware analysis report

Static analysis result for SHA-256 30eee5720dc484d5…

MALICIOUS

PDF

78.1 KB Created: 2021-06-04 15:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2de25c7aec29cdc4045cf86cb19c084 SHA-1: e11afb8811bb3ae380daaef01dd8363ce591a006 SHA-256: 30eee5720dc484d51c63739d4e8552eb88cbc758d758e3977c30a8b828e90afa
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/pbw?utm_term=fnaf+1+sound+effects+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413713/normal_604d196968e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_60581ec717ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_6047d6fa44863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_601da6b3b65ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_601690df44266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_60371769512a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_60611a6ed98a9.pdfIn PDF document text
    • https://rulukipa.weebly.com/uploads/1/3/4/3/134329123/114961.pdfIn PDF document text
    • https://xulopoxaxuwuzoj.weebly.com/uploads/1/3/4/5/134509354/jejekozugiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_603a219716f2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pinurakus.pbworks.com/f/strengths_and_weaknesses_of_great_man_theory.pdfIn PDF document text
    • http://garigor.pbworks.com/f/kingroot_2020_android_9_pc.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144416079/defobu.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414129/itouch_air_se_smartwatch_manual.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144420138/jonibejifarologadatutiw.pdfIn PDF document text
    • http://pefumugat.pbworks.com/f/xezudavabimeliraraw.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/55815384728.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144457416/formal_and_informal_email_writing_examples.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_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5020 bytes
SHA-256: 30083b777a6d6a735a9b5647694ca3b06c3e8cdd3c767a8c38e07083993a297c
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 11756 bytes
SHA-256: a65e0abed759b2c260614ab425749813a1a3cde81466073adbaf16206f7d5943

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