Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe3a785aebf6186…

MALICIOUS

PDF

88.6 KB Created: 2021-03-14 17:38:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9bd89f6a09020daf036dce876e4517ca SHA-1: 470be6c06f94404fc150455ee0c396a1222dd773 SHA-256: 5fe3a785aebf6186476d911d9dc9ba923a74f611844dc18136f3d77887e40fc8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://golowaki.ru/wix?keyword=vishnu+sahasranamam+sanskrit+pdf PDF link annotation
    • https://cdn.sqhk.co/virurewev/lPaBaed/shell_alvania_rl2_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/mRhggfK/kaganovedevijewuvowex.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/zokovowukujoporawekuwupaj.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/39147456751.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/adjacency_matrix_in_graph_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/H5esieP/lamiglowka_amaze_cube.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/98222963864.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/porusipetevalil.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/data_analysis_techniques.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/dungeons_and_dragons_cartoon_tv_tropes.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/which_samsung_phones_support_wireless_charging.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/hgdghro/fugejukolafeperi.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/sloping_agricultural_land_technology_salt_2.pdfIn PDF document text
    • http://sutedadudek.22web.org/zimoxula.pdfIn PDF document text
    • https://cdn.sqhk.co/wizenoku/iggU7je/leather_jacket_guide_styleforum.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/cribbage_scoring_chart.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/la_la_land_2016_full_movie_online_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://dololesorut.epizy.com/zarap.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_4f61ce03a57940078d81d4b8cca2e052.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/fovagejipur.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_d799349ad363496db42d578929604b23.pdf?index=trueIn PDF document text
    • http://pajupevezujugut.atwebpages.com/autobiography_comprehension_worksheets.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/asking_questions_about_cultural_anthropology_a_concise_introduction_second_edition.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
    • 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_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 5276 bytes
SHA-256: 903a8a944d60d33bf2ae4a428fa49cf886af735bd6f7dd978051fe12e425b5db
font_01_sfnt_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 12352 bytes
SHA-256: d6afa8932477429d7c8942191b821b6cc6e19cbd17e5afc4a6db4558436cd4a2
font_02_sfnt_off00012f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 16172 bytes
SHA-256: b6a6ca5d1ececf9b8f85cf34f243a5152d852bd6c46ff1fd844468d100e5349c
font_03_sfnt_off000144d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D1 4400 bytes
SHA-256: 1f3484232732a8ed95022713d42f98497480ba2dafa3c4a6532364f4e4577637