Malicious PDF — malware analysis report

Static analysis result for SHA-256 36abc286792cbeee…

MALICIOUS

PDF

67.9 KB Created: 2020-12-22 00:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 129e848a9a889382bac27e8b8c64046d SHA-1: 4994710896a457c75bf31fa523ceeb2fe1f308c6 SHA-256: 36abc286792cbeeed03c622ac5a33eddfb962b8f987b50f7272d3ba83812331f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links and a lure related to 'Hyperspin hard drive with roms', directing users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm, likely intended to redirect users to malicious content or phishing sites. No scripts were extracted, but the presence of external URIs and the ML detection point to a malicious intent.

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://traffine.ru/strik?utm_term=hyperspin+hard+drive+with+roms PDF link annotation
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/zolipezukati_jusujifeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f978f883d479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f89ee897eecd.pdfIn PDF document text
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/gatetofesutuwav.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/zarelusipofox/mutefuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566ac3dfdd95b60f3409b/t/5fcadf72551bdc47e79cf02b/1607130997461/todo_list_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/android_studio_convert_java_code_to_kotlin.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/apa_references_page_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/39587943044.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/assetto_corsa_tando_buddies_car_pack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b9817848ba205d39cf4c/t/5fcac275820cf678532ee8c0/1607123573917/vozakajuliwujupilokesexo.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/online_learning_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/angular_7_form_control_example.pdfIn PDF document text
    • https://s3.amazonaws.com/mokavilez/witches_ladder_pics.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_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 5384 bytes
SHA-256: 0b43a3bc08d44fc41db2923d6418e2a5ba149fb34c1d7b7de41aa407acfb8752
font_01_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 10832 bytes
SHA-256: 30644ee8095d03216d43857d652e7abdc61b884193c0eb582345066488010d92

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