Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb181814f68fe66…

MALICIOUS

PDF

62.5 KB Created: 2020-12-03 18:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b6048beb48ac375c01274eb781957b6 SHA-1: 93a3513271c0115b0294e2391fc9547362cf3d1f SHA-256: 8cb181814f68fe6681a467e45d37005bb234cfc4ea8a4b8671bbad6f904b2a6e
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=assistir+globo+reporter+globo+play PDF link annotation
    • https://tefimapotile.weebly.com/uploads/1/3/4/3/134351392/tufinedekofoxulo.pdfIn PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/3052880.pdfIn PDF document text
    • https://tasepatoravolun.weebly.com/uploads/1/3/4/3/134352318/1438110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5f9645498451d.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/6f2818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5fb2fc24af4c7.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/8209f02.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/dejolavubukugeb/bdo_ninja_armor_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/define_sustainable_development.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fc1ac5d3570fb44d141cb04/1606528094480/molapolopemividozudemak.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/25361135157.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/blank_book_cover_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/english_worksheet_for_kg-_ii.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AE 5220 bytes
SHA-256: 848feb5576c77657ef0d69c9a5f00bdefcc8fa6af2c0adb866d53757c350e922
font_01_sfnt_off0000b986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB986 8828 bytes
SHA-256: eb16d8245dac823ec27e1c73d0a8d56b7d6129afd91cf2a81d63b53eb99e9935
font_02_sfnt_off0000d7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B2 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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