Malicious PDF — malware analysis report

Static analysis result for SHA-256 0398b954f93c3884…

MALICIOUS

PDF

42.1 KB Created: 2020-11-07 07:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 14fcf3f0c841a03e53a2b9b274eb63f3 SHA-1: 16f59e851f47cd55e2a9b86d378f19add77eb865 SHA-256: 0398b954f93c388467479062426d2ad7d172c7c321e18f5c35d536f3434d1052
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffking.ru/123?keyword=xenserver+installation+guide In PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/f207626.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/69830.pdfIn PDF document text
    • https://kipakewetug.weebly.com/uploads/1/3/4/6/134606983/fesab-labiditowo-xitaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lotitogigi.files.wordpress.com/2020/11/bdo_cron_stone_guide.pdfIn PDF document text
    • https://nawazuled.files.wordpress.com/2020/11/90845161917.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/95221410305.pdfIn PDF document text
    • https://vumasut.files.wordpress.com/2020/11/57522333757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c26d15-805f-4521-9f27-f4e0fcd064b9/banapatapinun.pdfIn PDF document text
    • https://sugufafud.files.wordpress.com/2020/11/human_resource_book.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab15169-2126-4163-ae12-c7885b6ca4be/kubota_shop_manual_m6040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5c5769-9c2a-4b88-ad34-03f0f05f5131/whiteshadows_nasty_stories.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_off0000664e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664E 5028 bytes
SHA-256: fd883d4d338ea7936b50aaeb8eb823d61b276d26fb2e7feb1a4e9b2f5cf24704
font_01_sfnt_off00007778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10248 bytes
SHA-256: 48e9023ce853ace5afa80ff99051dbf9bbec07c277ce7ceac2c8511cd1243219