Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f9d1d6ca229466…

MALICIOUS

PDF

62.4 KB Created: 2020-12-17 08:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 71c024cad9b808b2a9dd91ae9e4d4e7e SHA-1: d3113525f2adc4cfe37fe21b5d858192ac58bce1 SHA-256: 97f9d1d6ca22946606d20dd2ae1d9256b1ea40d2e4ff3ea6c8bfba6e9c47d242
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 0.9995

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://traffnew.ru/strik?utm_term=12.2+chords+and+arcs+worksheet+answers PDF link annotation
    • https://pomaripo.weebly.com/uploads/1/3/0/9/130969966/mufonaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495685/normal_5fad82e772874.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/fd9e0013-aa6f-4911-84e7-9a624ee0083a/lasugukebusakikol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a0bbf7cf8c754052888c/t/5fc9870887b36f46d4f5c1a3/1607042824262/la_liste_de_schindler_le_livre.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53f0173fb5383b991def/1606374385000/gibimewaposajujesasiwesof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10304b8467722f1d4df02/t/5fc2c5eacb3e0f5771abd222/1606600170742/kikuzaninavup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ac42a5bc066edfb10807/t/5fc8c177970db930d9c84aa0/1606992248728/11537150976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5368b116eb00e3c682b4c/t/5fcacb83a004d41b30b1e2d0/1607125892380/openttd_multiplayer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36329dce-a236-4f64-933e-3066f47dc196/35457694228.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfaf82c6de34c7a38c638/1606220537239/9667984274.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/sofigijexenik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd3e3485235c868b8345/1606286657630/pogowazoruxexomuweko.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/bin_sachivalay_old_exam_paper.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD62 2020 bytes
SHA-256: cd54ff51818fd23fa86fe0f46aceb62826234859adbee4e7347b0bd3052352e5
font_01_sfnt_off0000b6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F1 5272 bytes
SHA-256: f1c22173d976867af77e1277bcc76a0d3b0c52f4fd8892cc91d74883b66fe592
font_02_sfnt_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 10500 bytes
SHA-256: 4ab9c73772e93b7f887ff1b430c12db12d3de439a4a37c2f16b3229d180d99dc

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