Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8379d2729a1967…

MALICIOUS

PDF

67.0 KB Created: 2020-11-14 06:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 634408499113f39707c62ba66223b810 SHA-1: 9cc433468b66bf23d2a1f49d4de33d4cb3b8307a SHA-256: 3a8379d2729a1967a4a32720a8e2040f6522ffe87defde8589b378e7147ffbc6
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://trafftec.ru/aws?utm_term=makeup+brushes+guide+video PDF link annotation
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/dazuvaj.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/93527f8a.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/a17857e0488fba.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/sujanupene-polosoluwipul.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/ddc5736a7c03c9.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/lurugegisulep-linilijadifikan-buvepu.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/gafovalasepamove.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/voxulija/apprendre_allemand_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/windsor_knot_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bruce_leroy_mma.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/rolarorilajitodopo.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/the_wretched_of_the_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/learning_forward_conference_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/magic_arena_android_2019.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_off0000ca4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4E 5460 bytes
SHA-256: 063e27b7c404229793fc247f102c1135e9ce020fd3fcbe4e7e553c32e92e5aed
font_01_sfnt_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 10152 bytes
SHA-256: e8698ed842f3250b3c0dc0f81388bfb1543880d07d4e5f0e523d8f92799c6484