Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73b7f3b44d55f0f…

MALICIOUS

PDF

47.8 KB Created: 2020-10-03 15:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4b0b6b4481dd0fe456e0d7fe158fc3fb SHA-1: 646b29723328342d0f2b73c8cc078432850672eb SHA-256: f73b7f3b44d55f0fa4af3ce0a2e5ef2fd9f94e6f0f9b69a967ab235f198af3da
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=the+essence+of+anthropology+4th+edition+free+download In PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/71800144722.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/fuvisiraziluka.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/67471880203.pdfIn PDF document text
    • https://site-1039476.mozfiles.com/files/1039476/donikasexut.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/39486173706.pdfIn PDF document text
    • http://jonejibif.mcdinteriors.co.uk/uploads/1/3/1/4/131408027/kevukejafilapotapoto.pdfIn PDF document text
    • http://files.vcmc.org/uploads/1/3/0/7/130738799/lopumavusizol-zugin-zuvilunanates-nejezizosaravox.pdfIn PDF document text
    • http://files.hellewoodworks.com/uploads/1/3/1/3/131384573/sapamexowajug-tabiluzut.pdfIn PDF document text
    • http://files.forgemd.com/uploads/1/3/1/6/131606133/puwawadunowaniwejove.pdfIn PDF document text
    • http://kibibo.purityconventionalseed.com/uploads/1/3/2/6/132681337/7817dfb44b79b4.pdfIn PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/ribojujumuzaren.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/nisaw.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/77152931040.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/28036301149.pdfIn PDF document text
    • http://nupisalok.gerdesgala.com/uploads/1/3/1/3/131398473/9640964.pdfIn PDF document text
    • http://files.dirtydrinkdesigns.com/uploads/1/3/0/8/130874655/doxepuzimid.pdfIn PDF document text
    • http://files.midtownwestschool.org/uploads/1/3/1/4/131408439/b8e0771f8720.pdfIn PDF document text
    • http://lulurase.alfredartwalk.org/uploads/1/3/1/0/131071164/1388560.pdfIn PDF document text
    • http://nadav.jessiperrywriter.com/uploads/1/3/1/4/131482933/332c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7073 5648 bytes
SHA-256: 21d0aadbec2b7c383dbee3c7665acde5b4f5ab55f4801960478c06b01ffa942f
font_01_sfnt_off000083c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C4 14436 bytes
SHA-256: 4a2a97c3b01db0652a9a08514f56a47676a31724c314cd9df2b161ab69929045

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