Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1b18a0dba6b31b…

MALICIOUS

PDF

92.1 KB Created: 2021-03-08 04:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 076ae6a9b0cc32e469adb33d6f913861 SHA-1: 9bb9212bc712a3127aaa706f88a5ea1499b5c2d9 SHA-256: ae1b18a0dba6b31b65368c71aff9e52a96c0ed19a8443c133862dd1605a7e4d2
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://mezovuduw.ru/wix?keyword=marie+kondo+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6036c5dd7ff46.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/c5KWMgj/block_strike_hack._net_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_600d4463ce0f1.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/54197581014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fc7e64767ca3.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/buzuzexanoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420930/normal_6003de7396d2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417988/normal_5fe04d32a3f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60192cd667f17.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/ggMBIjf/23260212294.pdfIn PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/d9fd2e.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/WhijPXG/pacific_palisades_brush_fire_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420245/normal_5fc92d56bc852.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/Sdie7jj/vazoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413119/normal_60172e952e860.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/50906941652.pdfIn PDF document text
    • https://musekakilex.weebly.com/uploads/1/3/1/4/131406804/xonikejonuzuf.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/89628216268.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/8353573.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/idHMgcO/forward_declare_template_specialization.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_c7ede2096c6e4d9c8a76aea5aaab4407.pdf?index=trueIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_8a53694c0afe4f749337998236934617.pdf?index=trueIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_f409eda6b9be4a1e85a74fa4e101830c.pdf?index=trueIn PDF document text
    • http://liraperuwuw.atwebpages.com/gatehouse_locks_installation_manual.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_4fc9f0494a30468182bb597616b43e1b.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_6653b2a3857a46e19e4dac730e7492bd.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAA 4896 bytes
SHA-256: 6c3fceca002b49d91f3674a1f8a8a1c0d9bf0746add2c5e9b63a329745effd25
font_01_sfnt_off00012068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12068 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000128f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F6 10300 bytes
SHA-256: b1811467da1d31d75e2be7cc8fb106b9d0375a523ed4845e8348f2ef3ddd1384
font_03_sfnt_off00014c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7A 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660