Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf993362c85c96a…

MALICIOUS

PDF

37.6 KB Created: 2020-10-16 16:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6576b4c24d4c85d99451e9dcd2476b71 SHA-1: 6546c5593f7520a9b22c53b7b3e18f3b8d2dad13 SHA-256: fcf993362c85c96a0bc181f0f623459d6bfcf8e4d1f59d7a595a04bbc9fe71b5
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to known malicious infrastructure, disguised as a download for "big data bernard marr pdf download". The document also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/pify?keyword=big+data+bernard+marr+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87036410551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f88f8ec4ef97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f889b2d9e696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f897e27c642d.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/fafusimadila_bewekuseb_zotudefubitos.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/812f952889b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f87428ec8fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f876b7329609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f896eb23d6e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f86f6149791a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f88362896485.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/39a61fe6-a828-4ed3-ba37-b66ff6fb1a25/mafagofipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d07225-cbd0-4566-8e7f-b318e5cddefa/92232417057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/vunepitajobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/reggie_white_stats_usfl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8530/9113/files/hive_thermostat_install_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/29158992575.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_off00005589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5589 5464 bytes
SHA-256: e911e7703340bbb130d385998a5a2257e08e1efff96eb89f56e872927cb575fb
font_01_sfnt_off0000681b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681B 9716 bytes
SHA-256: aa64e837bb72f0c589844904adc37ef41b9a8f4491acd54ece13e9a98a0d5148

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