Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c525e339469f74…

MALICIOUS

PDF

82.6 KB Created: 2021-03-18 20:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 488bf54f4bff7eab2405eb5a14b3f839 SHA-1: 5b07237ec240cd0937fa096d9ffd81eaf0f4a2ce SHA-256: 47c525e339469f74f3e7d0bfd5ea78094877b692450eb9edadc2da80a8208369
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of external URIs points towards an attempt to redirect the user to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and URI findings are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=mysql+command+line+cheat+sheet+pdf PDF link annotation
    • http://italylife.pro/zoviv20bg1.pdfIn PDF document text
    • http://jaxebememapi.iblogger.org/chocolate_pound_cake_nutritional_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_60332124cb73c.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/tugoxuwalige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_6001c380caff1.pdfIn PDF document text
    • https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/tazeko-wisifepanopi-xofiripinuwirux-levafixepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fe66e4cb2f48.pdfIn PDF document text
    • http://findattime.com/mifaduzeropn0ouc.pdfIn PDF document text
    • https://xadularapiro.weebly.com/uploads/1/3/1/4/131437383/2133955.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/4261471908.pdfIn PDF document text
    • http://pimunipimikuvaj.iblogger.org/how_to_see_guides_in_photoshop.pdfIn PDF document text
    • http://podipotekoi.ru/zevubewavabozenufawobesavko3a.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/a340ac.pdfIn PDF document text
    • http://dibiwunineso.iblogger.org/13966594925.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/adding_subtracting_fractions_with_like_denominators.pdfIn PDF document text
    • http://jotipire.iblogger.org/32238811256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450145/normal_5ff8fb1a99f25.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/93147965931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemutuzuvaw.rf.gd/budget_plan_sheet_free.pdfIn PDF document text
    • http://muvawexitu.epizy.com/zolujapatuwat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 5532 bytes
SHA-256: b8fe1d6795643edf82560f1de94af52dee208ff6d6d5457d059007e41de22c9a
font_01_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 12756 bytes
SHA-256: d0255038792c38d012de4effee9e308031806de771611c6207781d9b09913e82
font_02_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 16204 bytes
SHA-256: 95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0

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