Malicious PDF — malware analysis report

Static analysis result for SHA-256 30eee4d4ccf337cd…

MALICIOUS

PDF

92.3 KB Created: 2021-03-10 16:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf708bc77dc17051f0c49a707d3b34d0 SHA-1: 9b88de535510ebeaff87dde60c4df5ca3832c518 SHA-256: 30eee4d4ccf337cd5f12f8c091d6bc059dd80f25fe420bfe187d75b0e42955c8
186 Risk Score

Malware Insights

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

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 0.9985

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/strik?utm_term=how+to+learn+salesforce+marketing+cloud PDF link annotation
    • https://buwipifigidorip.weebly.com/uploads/1/3/0/8/130813409/kojuvirevevoleda.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/xudiparojopok.pdfIn PDF document text
    • https://noloxuxema.weebly.com/uploads/1/3/1/4/131453633/9327959.pdfIn PDF document text
    • http://topsalon.xyz/eq_blacksmithing_guide_2017dkrhl.pdfIn PDF document text
    • http://it50discount.pro/boardroom_limited_singapore_annual_reportdsu9e.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/685c7c.pdfIn PDF document text
    • https://kabawerabava.weebly.com/uploads/1/3/0/7/130774965/799a8a0dc.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/4170689.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/patamowesesi_fojadelujiwi_sasugubowato.pdfIn PDF document text
    • http://repair-planshetov.ru/bbc_iplayer_android_failedfe261.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/salatewe-mexiguzu-dafozezabu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovetijif/summer_escapes_pool_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a502cd-b927-4a2f-aa6e-df91f085f640/mizurajugexoxaluwivoxugo.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/lagu_batak_soundtrack_film_toba_dreams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adc7cb1-4ac8-425d-a5a9-02eeea7e203b/natojumiroreluvu.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_20ed94765e0f4415833e06c92b8668a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/siemens_built_in_coffee_machine_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24509ddc-f068-4e6e-94ec-8c55336a638f/bfw_publishers_ap_statistics_chapter_3_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2b213f-b499-4cfa-9015-df23866abbb0/59771941127.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/free_powerpoint_infographic_templates.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_dad3a711baae420a8d31f933aa3e396f.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_2aa07632794e4927ab6ed5321aaa2e34.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 7052 bytes
SHA-256: 641b010f892c403c6c9c8bc881e2d1041c79b5cde5f1bc87d25e832808eb3d19
font_01_sfnt_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 1944 bytes
SHA-256: 3682195be1c97c9daccaa9af1f0fdebe1d75ed7543ffa85d033cb2f13439c370
font_02_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 5456 bytes
SHA-256: 0c8656ec9a9183b6d0529a9b6a7cf22184ef8495c720514961213eb44826aabb
font_03_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 11004 bytes
SHA-256: dd32de41624a408dc2e7cf1476e9f16efc85dfc293b0e3a28f4bb5efb68aad72
font_04_sfnt_off00014cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB8 16336 bytes
SHA-256: 18820e64b89489c6901bdbad9637cefc87d81bb55776bf10726fbc7439458c45