Malicious PDF — malware analysis report

Static analysis result for SHA-256 578926b9763f1e6b…

MALICIOUS

PDF

79.9 KB Created: 2021-06-15 12:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d19a7210427f80b22d3eaa7507fd49b4 SHA-1: a1e6fb39d4b1650f229b878964e6a73c069bc561 SHA-256: 578926b9763f1e6b135248443df90f6c26713ea14fdb4b9e282735c834b284f5
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=fifty+shades+of+freed+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481285/normal_60c71bb518d1b.pdfIn PDF document text
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/pukirusaxepo.pdfIn PDF document text
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/bokufafunad_laralujosukin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_605cb0807c53e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fde3e24c2f89.pdfIn PDF document text
    • https://jubagimijan.weebly.com/uploads/1/3/5/3/135333733/9488789.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/zovopotitibimij.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/5769756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477623/normal_6001bf68dbcc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_605795aa224f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/911d5bac-cdba-468b-a446-0091dab6728b/imp_english_words_with_meaning_in_marathi.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/99262302051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a465f1a2-4f16-447b-86ef-c03836a144c9/deni_ice_cream_maker_manual.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/nexes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332df4c4-54bb-4b9d-98be-b994719ba7b0/biguzaredexekigodifetax.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144436389/how_to_make_a_employee_schedule_template.pdfIn PDF document text
    • http://fuzobonesujo.pbworks.com/w/file/fetch/144569823/pumidibe.pdfIn PDF document text
    • http://rerikisozid.pbworks.com/w/file/fetch/144640581/87025515843.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/92857759704.pdfIn PDF document text
    • http://warikeku.pbworks.com/w/file/fetch/145271514/64756855155.pdfIn PDF document text
    • http://buzivevej.pbworks.com/w/file/fetch/145317093/rebel_cargo_ship.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/boboiboy_the_movie_2_english_subtitles_download.pdfIn PDF document text
    • http://tojifen.pbworks.com/w/file/fetch/145176090/gta_5_secret_garage_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb138041-61b7-459c-9dcc-7c988d55e82b/airport_operations_manager_salary_in_india.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_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 4816 bytes
SHA-256: 1e2a01799ce5d42bc6787962752f50eb630ec56ed7c13c19849c674ed65d06eb
font_01_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 11212 bytes
SHA-256: b62e319e1009829d9e0a9bca955abb2599828ebce755fecdb4f532e4418f6737
font_02_sfnt_off0001236f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176