Malicious PDF — malware analysis report

Static analysis result for SHA-256 2174569d415cd519…

MALICIOUS

PDF

79.4 KB Created: 2021-04-27 18:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9daba16a67d18ac0246f1465f6ce1fc8 SHA-1: 21ef41290fd2e52548005e3a3f00fc40d92698de SHA-256: 2174569d415cd51988c2c5af9f0a6f611243b8cf9af097f7bbe9d30b81afc454
206 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a social engineering attack, specifically a ClickFix lure, by instructing the user to interact with the command line. The ML classifier and ClamAV detection strongly indicate malicious intent. The document also contains numerous links to external domains, some of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://bologen.ru/strik?utm_term=what+are+the+run+commands+in+windows+7 PDF link annotation
    • http://safijejog.mygamesonline.org/pujar.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/ways_of_seeing_john_berger_espaol.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/kufoniluzazopovarar.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/90576585355.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/gatutij.pdfIn PDF document text
    • https://cdn.sqhk.co/fixakozumad/cVj6gft/basazujapewadojitaz.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/virtue_ethics_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/wipabamof/U2giihf/wufaleditiwite.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/five_approaches_to_qualitative_research.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/CGgfjdw/google_chrome_free_2018_windows_10.pdfIn PDF document text
    • http://nibelv.xyz/monstrous_races_dnd_5ei3yvj.pdfIn PDF document text
    • http://keksik24.ru/cells_alive_animal_worksheet_answers_keyal3at.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/Ijcgfhb/7554868798.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/b6921e92-6f64-4023-adae-88eb2dcc1248/how_do_i_change_my_braun_thermoscan_from_f_to_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744debde-9df1-40e5-aa99-914d3522ac01/harry_potter_5th_book_illustrated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748aa18b-1da6-42a5-8119-7b7291de5572/69163849867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8174cbb1-abb0-4a9c-aaf7-5443c863abff/61263947829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61061482-35d2-4149-8459-1cd1d084bcd4/how_does_weathering_erosion_and_deposition_affect_landforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b14a95-6a91-41ae-9799-232f29e64d63/fivinolarik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ae8311-db0c-4c5e-a475-4ab4e24d583d/91888130478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5df221-230f-48b7-b1e7-1e37cfbe41e0/17137762007.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_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 5332 bytes
SHA-256: 5778010f26bd71c7e209f1a4c32f30b587e43eaa9fa64c3db1c8a95974f20663
font_01_sfnt_off000109bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BC 11188 bytes
SHA-256: 9a292c896732790b9f5be93bd0aa54c7c0c9dab8a2e868de80a4f12b77cd5f94