Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f901bed75fa5f7c…

MALICIOUS

PDF

42.1 KB Created: 2020-10-15 21:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 19380e935f53d7ffe3a79ae504975887 SHA-1: 7dc51fa099bb2294a7aa95c8f335639f9839ac3e SHA-256: 9f901bed75fa5f7c5eebba73bfd9063d15ba06aede6fcdd3f6704b155ab2110c
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://cctraff.ru/strik?keyword=convert+jpg+to+high+res+pdf In PDF document text
    • https://site-1042434.mozfiles.com/files/1042434/bilayer_floating_tablets.pdfIn PDF document text
    • https://site-1043415.mozfiles.com/files/1043415/88396923958.pdfIn PDF document text
    • https://site-1042672.mozfiles.com/files/1042672/piriwenanopefokipub.pdfIn PDF document text
    • https://site-1039404.mozfiles.com/files/1039404/25490207705.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/duloxowok.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/tizobajevi-dopebulixoni-javomumarilit-roruripofexede.pdfIn PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/69004957051.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/lajojinanob.pdfIn PDF document text
    • https://site-1039222.mozfiles.com/files/1039222/xogedajujo.pdfIn PDF document text
    • https://site-1042284.mozfiles.com/files/1042284/pemebidupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f87bcb3904b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f871a74ad17a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f87700ca647d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8882cf5e848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7677/9165/files/chapter_11_motion_wordwise_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6363/9703/files/98695199643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9779/0366/files/ludujavifebetegudaxokakuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61034040-acc7-423c-a091-20b80959cc31/49349122506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26c11de-31e3-4c1a-ae75-1306b6d30bae/lisugilikejikerunikero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53613781-2010-4c37-9360-bcc2eb1f5472/dixetaxodonofeb.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_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5104 bytes
SHA-256: d4816dd522c224ca38cd5218722676b5c87e60487bb424324ceaccc88d122517
font_01_sfnt_off0000798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 9812 bytes
SHA-256: 3a5f007edcd0aa2da14b2e3a912ef230692ffc408027132f0066cf89ca5d076a

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