Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc014e3a84a69f54…

MALICIOUS

PDF

130.0 KB Created: 2021-03-16 02:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c914736d6803468e5735770adca2c490 SHA-1: 27c0bb18b69264c868f09c6c6b5dc21bd0448f14 SHA-256: fc014e3a84a69f545caa14f4cc5c9a0cd00b947a04b5b47eb2541f59e1f45546
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=borderlands+3+all+legendaries+spreadsheet PDF link annotation
    • https://pivamuwonojazop.weebly.com/uploads/1/3/0/9/130969183/9592055.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/pazirixivoxinas-gasiniwujuj-vidavo.pdfIn PDF document text
    • https://wokogosomexar.weebly.com/uploads/1/3/5/3/135322546/7189531.pdfIn PDF document text
    • https://rorupuloloxotog.weebly.com/uploads/1/3/1/4/131409755/lifus.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/9ghhaid/download_ragdoll_arena.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/sIjaibw/multicraft_block_craft_mini_world_3d_descargar.pdfIn PDF document text
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/vutinizejegeb-fisumugefekata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_fe04872646844ebfb9d00f7b9fce7f38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/062d2c08-b2e1-4c47-9d10-d16a1a3f1901/the_nozzle_forward_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/high_thread_count_percale_sheets.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_1b01ea7033144068b278c29ab202e0e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47879c37-78d7-46a4-93bd-01b7dc14173a/love_story_song_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492d1759-8069-4659-a0ac-f73eb2425512/zozadaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc3ec2d-a896-4e2d-8667-1ac54d19437f/how_to_open_digital_sentry_safe_without_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180b175b-a674-418b-97ac-03c0b200e97e/61480903524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbae866-4878-497c-8ae2-5dd3865412ce/41908662310.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/17146455501.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/bletsoes_market_report_feb_6_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c2cc56-f40b-43f5-a753-30389d48e9ad/53235841890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac2a122-8e85-4167-b415-788753d47669/76202375346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff13e578-83b0-45fa-bb1a-cfe441dd010d/bently_nevada_3300_xl_installation_manual.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_off0001bb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB9C 5432 bytes
SHA-256: ceb6f69820bd0455666f00d5b3ac98b6e9d6fe403bc3e93d672cedf5788769fe
font_01_sfnt_off0001ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE0A 13844 bytes
SHA-256: 2474d613525542b15d1e614199f4c8f838dc1d907c2cdd967bc138b2dc6bfc61