Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d576b0c061d11fb…

MALICIOUS

PDF

156.0 KB Created: 2021-03-23 09:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2b8a45e88fe5354a44d0f291be288cb1 SHA-1: e91d9690aa1937ec8074ee74439b39af3e8aea2a SHA-256: 2d576b0c061d11fbb5a8c9b6392481e1c6e08abd85455e7347264ccc0915a80a
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. One of the primary external URIs, 'https://maypoin.ru/award?keyword=masterworks+press+pdf', suggests a lure to a site that may distribute further malicious content or phish for information. The PDF also exhibits characteristics of a link farm on disposable hosting, indicating a potential attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=masterworks+press+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370529/normal_60170945d5fe4.pdfIn PDF document text
    • http://rubulutusalev.22web.org/galurukivalivabov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_5fe6862b7bd5e.pdfIn PDF document text
    • http://linza.media/66337531243fvkhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60219dd60a951.pdfIn PDF document text
    • http://takipleskazan.org/what_maritime_law_means91jz7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffc56ddbb8bd.pdfIn PDF document text
    • https://cdn.sqhk.co/sevilebup/SjjDsjj/wasetabigutonumovavanekan.pdfIn PDF document text
    • http://jotewelife.iblogger.org/vojavokojaruzidefagigop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479470/normal_6052eb3a03537.pdfIn PDF document text
    • https://cdn.sqhk.co/vezubusevof/iiKhemG/zavumovusikuvotit.pdfIn PDF document text
    • http://debesur.iblogger.org/bbc_iplayer_using_data.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/f9Xidgd/musically_inclined_person_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nawuvud/tulafadejofukagibi.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/coloring_sheets_for_adults_fall.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_ec970d10ac694fd693b7c6687e1ebcdb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/12448976528.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_af885e6526184de692ed069956128740.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/sabixapujudesimorateral.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_2d2038b49b0243af835a3052b70b8fd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/accorhotels_group_annual_report.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_off00022286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22286 5164 bytes
SHA-256: cc6c570441bf540932eabf65dc78a7c1178fc17724a49c1510f5d5b2151751af
font_01_sfnt_off00023448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23448 13524 bytes
SHA-256: 56665e7e0a7805ff4a71c0c05199009541c74cc3291225cf93eccbf3d3b26967

Open this report in the interactive analyzer, or submit your own file for analysis.