Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d79701562cd4f8…

MALICIOUS

PDF

83.9 KB Created: 2021-03-15 10:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 112ed3fe9bca5c48ce845e3139366420 SHA-1: 1c16cabe01e1d1e3701cb23a4b32829a33db6b09 SHA-256: e6d79701562cd4f8f5cbabeade2b095a7c4fcb951f14c5f6d01416300fd0b5ad
186 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 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://midufefew.ru/123?utm_term=gabby+bernstein+meditation+spirit+guide PDF link annotation
    • http://mevukavotidu.getenjoyment.net/35688586704.pdfIn PDF document text
    • http://intekzafast.online/kawaii_bot_commands98q4m.pdfIn PDF document text
    • https://xatotowo.weebly.com/uploads/1/3/2/7/132740458/bukarig.pdfIn PDF document text
    • http://hiziryigit.online/how_to_fix_the_bobbin_tension_on_a_singer_sewing_machinetdvsy.pdfIn PDF document text
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/dufawima.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/10cf5d40f.pdfIn PDF document text
    • https://noxazevoda.weebly.com/uploads/1/3/5/3/135348256/1253863.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/71b98e.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/nebajizuxa-tesobagusazodab-namuzubaxus.pdfIn PDF document text
    • https://minawitagolufu.weebly.com/uploads/1/3/5/3/135312922/4354992.pdfIn PDF document text
    • http://rezltml.xyz/celestron_powerseeker_70az_how_to_focus5qdl1.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/kabbalah_libro.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/davubewu/43291339435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc00ebd9-b4dc-4c2f-a47f-0b3c2fa25dff/royal_mail_international_postage_christmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d51a4ea-98ab-4361-96ba-3e6891d6f2a0/form_an_alliance_with_a_parcel.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/sazevegowogenib.pdfIn PDF document text
    • http://rijemow.onlinewebshop.net/bhagavad_gita_yatharoop_kannada.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_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 5520 bytes
SHA-256: d348c80a118bff279a68a3736066c53786b8227c4b0a9c7a78af9f782592ef05
font_01_sfnt_off00011bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCB 10852 bytes
SHA-256: 01629f1318e5987070880bdeb92acb11a016a9412557a6965e5748aa1d830717

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