Malicious PDF — malware analysis report

Static analysis result for SHA-256 7400003595f1677a…

MALICIOUS

PDF

80.5 KB Created: 2021-03-19 20:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26bf76f0d9da2a7749794e464a049a36 SHA-1: 57cbd341c33e9748b704e31e66ed6de0127715bc SHA-256: 7400003595f1677a2a02e7c221e62ceed459dc688e53083fe2e129e922afdd4d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=burger+king+funnel+cake+fries+nutritional+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451545/normal_602e44a332b34.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/47469158699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_600f0f3100137.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/introduction_to_finite_element_analysis_using_solidworks_simulation_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_60466f9d9493c.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/xedotakadetuketofajogifis.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/zugezomuxobijiret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_6045f56a83f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_6053ab75e16f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_60360d55b6106.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479436/normal_5ff1818fe628f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_60351eb8da561.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/69257605561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_60372719b0dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_60243a41d4a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_60184896ab97f.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/nuboforigipepej.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/b1c2082b-da6b-4c70-8aac-648202fe6923/what_to_do_if_i_forgot_my_acer_laptop_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67aaa19f-1c07-468b-9f1f-9e4d4d6a6fec/what_are_the_extra_fees_on_allegiant_air.pdfIn PDF document text
    • http://xobeminal.atwebpages.com/community_acquired_pneumonia_idsa.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/nekotesebamarunebefu.pdfIn PDF document text
    • http://rijemow.onlinewebshop.net/tagafaxuvuromodofune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9356dc-9dbf-42f8-9e4d-1fa6f69dd99e/vapibisogipew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb45bcaf-593d-4bac-842d-769298650915/88358797656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8357d2aa-bed2-4efc-afc2-2c83d320b597/lemonade_recipe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 5312 bytes
SHA-256: 89abe2dbb1bca1c86f1b091ba4af0817f4249c9ddc5efd3ad1abe925bbef2e18
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 2448 bytes
SHA-256: d966ccd375f5d79ee45849b8ac84c59a19f80536bf2da1f4abb8ddfd93f24d09
font_02_sfnt_off00010b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 11692 bytes
SHA-256: e14c2b976ab067afa26379cd3e34caf7e9ead166b81d40056d5ffc8c3c3804f0