Malicious PDF — malware analysis report

Static analysis result for SHA-256 327f45fa5162cbc3…

MALICIOUS

PDF

79.5 KB Created: 2021-03-22 21:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 82560b2b4dd4e2151eaa5df13dad59d0 SHA-1: e8ac5f02ad9735931bfe9042ffe14ab687aa256f SHA-256: 327f45fa5162cbc3d81b02744bc5f7de4df131ff81896fcbfe781957d0f02447
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with the primary suspicious URL being 'https://gimoguvi.ru/award?keyword=iceland+golden+circle+map+pdf'. The PDF_SEO_LINK_FARM heuristic firing suggests the document is part of a link farm designed to manipulate search engine results or direct users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gimoguvi.ru/award?keyword=iceland+golden+circle+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450733/normal_6053c4eb76b60.pdfIn PDF document text
    • https://pusenosegunilo.weebly.com/uploads/1/3/4/7/134705238/6664776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_601ef2b5dd4d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_6035d998d532d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386594/normal_5ff26bcb35396.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/lixivusima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_602fe20d896f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_604b31d80c7c3.pdfIn PDF document text
    • https://nubamosotaz.weebly.com/uploads/1/3/1/3/131383510/8097455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_604a80b18e7dd.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/39fd9217-a4e2-497c-b2fc-e1a42f40aee6/18640319279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df2d922-f0e6-49d4-bdcb-9f11a5cbbe4d/how_to_find_instantaneous_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92795c10-f79d-43f2-8197-c93ec6e5d4b4/fakav.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/6893776732.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/newibut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a862c5-dd40-43c4-ac74-c3312739601a/the_stand_2020_new_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd11a0a-09e7-4ddc-9cb2-bcd2e07152a3/how_do_i_book_an_appointment_at_an_apple_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb9fed5-5109-4354-8e1e-2931fc11b937/bibatudafoxima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8dff1ae-0588-46b0-a9dd-0b5d587f38b9/much_ado_about_nothing_summary_act_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/60505895375.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/xasekefivuboxab.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/12480423003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f5509b-9b7e-4ddb-981a-594e7d8958e1/75965584347.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_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 5232 bytes
SHA-256: 98194f9a94ca72c61e2b5f5bcf7f13387dba52ae2e51414b64c649f03317de76
font_01_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 12360 bytes
SHA-256: 349f2ef450b83b273b2a496a22896b7983f3aa098c1262bfc259fa782e74e101

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