Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b1222c151ddefa…

MALICIOUS

PDF

40.8 KB Created: 2020-11-08 02:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e00d7a695533c0f23dd606387a7f665e SHA-1: 16c7815f7e9e89be965b22fe29b12a5d96c32091 SHA-256: 64b1222c151ddefa28e7efe2f026abcc9e60d28fce918d3cf23a1cadbf27403b
66 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 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 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=online+introduction+samples PDF link annotation
    • https://ripilebaxozeduv.weebly.com/uploads/1/3/4/2/134266308/4503639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_5fa2423b27fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5f97df77427ae.pdfIn PDF document text
    • https://futiwetag.weebly.com/uploads/1/3/4/3/134367494/5310826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8bd1dfd0f91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://saresuzir.files.wordpress.com/2020/11/webzen_mu_online_leveling_guide.pdfIn PDF document text
    • https://veralaf.files.wordpress.com/2020/11/50961445114.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/pizeleliburib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd9b446-482e-42b0-ad71-e6d8cdf18a4e/dokkan_battle_super_battle_road_guide.pdfIn PDF document text
    • https://waragifogeva.files.wordpress.com/2020/11/queen_s_code.pdfIn PDF document text
    • https://xivikutedito.files.wordpress.com/2020/11/aw139_flight_manual.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_off00006246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 5248 bytes
SHA-256: 6c758b68dd2f09b49c69c7bf8fc6d967a9b409427bebe3aab28a8f62aa6d2456
font_01_sfnt_off00007401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 10176 bytes
SHA-256: 0cdfd8b7855d22a4fc825e4ef403d762a487c860a29067b89a4290990526a403

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