Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e0b1066bbe9659…

MALICIOUS

PDF

72.3 KB Created: 2021-01-10 17:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06b16cf925a91eb7b069e207587da172 SHA-1: 80a7ce27349f9ba8b81ba61f080286491ba20762 SHA-256: 34e0b1066bbe96594b3f418b2df636cc50e4719975bcee3205dbee2f638bb163
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to attract users searching for specific content like game hacks. The ML classifier strongly indicated maliciousness, and the embedded URLs point to sites that likely host or redirect to malicious payloads. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/wb?keyword=download%20gun%20master%202%20hack%20apk PDF link annotation
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/6691424.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/3003e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_5faf6bf93215d.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/iefPibU/daruzatozununowa.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/109497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_5ff21dbe13d97.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/metuliwurixi_zapadajevu_taziju.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/3652903.pdfIn PDF document text
    • https://pafirolexorawu.weebly.com/uploads/1/3/4/6/134612045/bbacc.pdfIn PDF document text
    • https://cdn.sqhk.co/rotelizedo/Zic9ijE/nhl_21_be_a_pro_all_star_game.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/girituxajut.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/4id5TaS/download_tubemate_apk_terbaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fe149aef17ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5fe4ffe3d8e3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000ce2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 5608 bytes
SHA-256: f62037ccf5f5cd6239aea024b1234ff4257d4a3378122046d1f0d33f6ec29406
font_01_sfnt_off0000e12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12A 10844 bytes
SHA-256: 22190db8722352abdc334f3a2c9587266470ed40b1b539c16d8b2b35b7790687
font_02_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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