Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06cc79aef7ccba5…

MALICIOUS

PDF

86.5 KB Created: 2021-03-17 17:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c17ffbdc3d96f2f08fb38d8965646ce5 SHA-1: f74c0d257c4ef0c85bd6930a8bf55a0c4742798b SHA-256: a06cc79aef7ccba5d66586ed0e1f50ad6906e4c8b22638925bd6421e2fe600ea
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to suspicious domains, including one that is part of a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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://kuzutuzo.ru/award?keyword=arabic+to+urdu+words+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fde5f363f407.pdfIn PDF document text
    • http://wenukitabozuv.22web.org/resumen_del_libro_el_seor_de_las_moscas_capitulo_2.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/wusumawopelifivafonixobaf.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/rifoworirugazafuf.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/china_s_beidou_navigation_satellite_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_604823c1ceb4c.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/what_is_the_curse_in_the_wrath_and_the_dawn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff01ad469134.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/wd_tv_live_remote_control.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_6046e211366e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28635d2-151b-4641-9b6e-450aeb9261d0/88392650460.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/luxifuniladetomosefizom.pdfIn PDF document text
    • http://memepev.myartsonline.com/robin_cormack_byzantine_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f08cd0-daf6-4888-bfb5-8ceee5c7dc8a/dupigomivotuvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250474f2-36a7-4283-a3e8-c5088da4f889/cfa_syllabus_level_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bf30da-0f3d-4034-8762-932e319a5916/migeletujajame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fa9093-4ad9-419b-adad-65ee644c5658/how_to_win_one_night_ultimate_werewolf.pdfIn PDF document text
    • http://jebefufodapiwi.epizy.com/71401483733.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/vewanawazikikezumalof.pdfIn PDF document text
    • http://nirutavikuda.epizy.com/64117551678.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000126b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126B0 21784 bytes
SHA-256: f65680e6657cadfa2d30ece138c93f538d982397c86ae1d7a8c9f63b3d9427f3
font_00_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5336 bytes
SHA-256: 36d4eaffe4f742ef5435fd6d6a3afa578e3dbb84940e113346bab44631b19a06
font_01_sfnt_off0000fdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEF 12356 bytes
SHA-256: 991d3d35dd4e15b758bd040bdfa1b582398bfde4a9fc6eef47ababf54dfc293e

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