Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dba4b2f4d112be6…

MALICIOUS

PDF

72.1 KB Created: 2021-06-10 02:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e369e73380d7715d2d2485229a46c5b7 SHA-1: 1e05998ad983715422de93834280d46a3b06d9a0 SHA-256: 8dba4b2f4d112be687750f867a615eb18c37da391732f86ace0956eb7130d5ed
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 0.9997

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://oniceh.ru/pbw?utm_term=to+pimp+a+butterfly+album+zip PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5ffbc062c1995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_601861a42c8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460071/normal_60bc3988aaead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_600fbdec42b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_601bc7604f24e.pdfIn PDF document text
    • https://karuxuli.weebly.com/uploads/1/3/4/3/134377251/139b51a8a1d3.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/lotijepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_60519683b2144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_6064b8b55c5cc.pdfIn PDF document text
    • https://sozamevojor.weebly.com/uploads/1/3/5/3/135309273/velofuvulebamataju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77a9262-1de5-46ac-8704-a1fad9de1560/gisojujepileba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e4c5f3-e3d6-4731-85f4-4f0ef0bbfde8/13476571049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca65ecb-95ef-4077-b308-d5c9cdff034d/13925415587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9d1949-cec0-4730-968b-f60628203be7/8026715054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49855bb-3e63-4838-9e30-616822687744/54171827577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9d505a-8d1b-4f59-ae9c-1b64a144f35e/talibojirovimadakij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ed0a4e-aa47-4eac-b775-72777ee75a7a/wafet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc81b3df-9bc3-44b2-9e66-af77c00142d8/vowufimoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcf7e16-d1da-41b4-9d0e-e2fcdf398959/apa_makna_hari_raya_idul_fitri_bagi_umat_islam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5c12e2-d654-4ba7-8f43-7bd063d97712/libro_de_geografia_4_grado_contestado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4f75f0-845a-42cc-9d13-959db7fba985/66074902919.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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 5108 bytes
SHA-256: ad5561e98ea08881373f89b6ac111c1bce66e7727c777c7515c896cc01d8f61f
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 11448 bytes
SHA-256: ac4eebfdfaccdce57f097ae7780c645b66c1b4992259c02e22f80e0fa7a5d607

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